December 7, 1848\n| rowspan=2 | Legislature failed to elect due to a three-way split that prevented any candidate from earning the required number of 30 legislators' votes.",{"template":{"target":{"wt":"sfn ","href":"./Template:Sfn"},"params":{"1":{"wt":" Clark "},"page":{"wt":"17–46, 72–79"}},"i":1}},"\n| rowspan=2 | —\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"29"}},"i":2}},"\n| rowspan=2 | —\n| rowspan=2 | Legislature failed to elect due to a three-way split that prevented any candidate from earning the required number of 30 legislators' votes.",{"template":{"target":{"wt":"sfn ","href":"./Template:Sfn"},"params":{"1":{"wt":" Clark "},"page":{"wt":"17–46, 72–79"}},"i":3}},"\n| rowspan=2 nowrap | December 28, 1846 –
December 7, 1848\n| rowspan=2 colspan=3 | ''Vacant''\n\n|- style=\"height:2em\"\n| rowspan=2 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"30"}},"i":4}},"\n\n|- style=\"height:2em\"\n! rowspan=9 | 1\n| rowspan=9 align=left | [[File:George Wallace Jones, US Senator.jpg|100px]]
'''[[George W. Jones]]\n| rowspan=9 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=9 nowrap | December 7, 1848 –
March 3, 1859\n| rowspan=3 | [[United States Senate elections in Iowa, 1848|Elected in 1848]].\n| rowspan=3 | 1\n| 1\n| [[United States Senate elections in Iowa, 1848|Elected in 1848]].\n| rowspan=4 nowrap | December 7, 1848 –
February 22, 1855\n| rowspan=4 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=4 align=right | [[File:Augustus Caesar Dodge.jpg|100px]]
'''[[Augustus C. Dodge]]\n! rowspan=4 | 1\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"31"}},"i":5}},"\n| rowspan=4 | 2\n| rowspan=3 | [[United States Senate election in Iowa, 1849|Re-elected in 1849]].
Resigned to become [[United States Ambassador to Spain|U.S. Minister to Spain]], having lost re-election.\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"32"}},"i":6}},"\n\n|- style=\"height:2em\"\n| rowspan=6 | [[United States Senate election in Iowa, 1852|Re-elected in 1852]].
Lost renomination.\n| rowspan=6 | 2\n| rowspan=2 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"33"}},"i":7}},"\n\n|- style=\"height:2em\"\n| \n| nowrap | February 22, 1855 –
March 3, 1855\n| colspan=3 | ''Vacant''\n\n|- style=\"height:2em\"\n| rowspan=3 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"34"}},"i":8}},"\n| rowspan=5 | 3\n| [[United States Senate election in Iowa, 1855|Elected in 1855]].
Elected invalidated, as the [[Iowa Senate]] had not participated in it.\n| nowrap | March 4, 1855 –
January 5, 1857\n| {{Party shading/Free Soil}} | [[Free Soil Party|Free Soil]]\n| align=right | [[File:James-Harlan.jpg|100px]]
'''[[James Harlan (senator)|James Harlan]]\n! rowspan=8 | 2\n\n|- style=\"height:2em\"\n| \n| nowrap | January 5, 1857 –
January 29, 1857\n| colspan=2 | ''Vacant''\n\n|- style=\"height:2em\"\n| rowspan=3 | Re-elected to finish his vacant term.\n| rowspan=6 nowrap | January 29, 1857 –
May 15, 1865\n| rowspan=6 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=6 align=right | [[File:James-Harlan.jpg|100px]]
'''[[James Harlan (senator)|James Harlan]]\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"35"}},"i":9}},"\n\n|- style=\"height:2em\"\n! rowspan=8 | 2\n| rowspan=8 align=left | [[File:Hon. James W. Grimes, Iowa - NARA - 528410.jpg|100px]]
'''[[James W. Grimes]]\n| rowspan=8 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=8 nowrap | March 4, 1859 –
December 6, 1869\n| rowspan=3 | [[United States Senate election in Iowa, 1858|Elected in 1858]].\n| rowspan=3 | 3\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"36"}},"i":10}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"37"}},"i":11}},"\n| rowspan=5 | 4\n| rowspan=3 |[[United States Senate election in Iowa, 1860|Re-elected in 1860]].
Resigned to become [[United States Secretary of the Interior|U.S. Secretary of the Interior]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"38"}},"i":12}},"\n\n|- style=\"height:2em\"\n| rowspan=5 | [[United States Senate election in Iowa, 1864|Re-elected in 1864]].
Resigned due to ill health.\n| rowspan=7 | 4\n| rowspan=3 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"39"}},"i":13}},"\n\n|- style=\"height:2em\"\n| \n| nowrap | May 15, 1865 –
January 13, 1866\n| colspan=3 | ''Vacant''\n\n|- style=\"height:2em\"\n| [[United States Senate special election in Iowa, 1866|Elected to finish Harlan's term]].Clark, p. 141: Kirkwood 118 votes, [[J. F. Stomenan]] (Democratic) 20
Lost nomination for the next term.\n| nowrap | January 13, 1866 –
March 3, 1867\n| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| align=right | [[File:Samuel Jordan Kirkwood.jpg|100px]]
'''[[Samuel J. Kirkwood]]\n! 3\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"40"}},"i":14}},"\n| rowspan=5 | 5\n| rowspan=5 | [[United States Senate election in Iowa, 1866|Elected January 13, 1866]].Clark, p. 141: Harlan 118 votes, [[H. H. Trimble]] (Democratic) 20
Lost re-election.\n| rowspan=5 nowrap | March 4, 1867 –
March 3, 1873\n| rowspan=5 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=5 align=right | [[File:James-Harlan.jpg|100px]]
'''[[James Harlan (senator)|James Harlan]]\n! rowspan=5 | 4\n\n|- style=\"height:2em\"\n| rowspan=3 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"41"}},"i":15}},"\n\n|- style=\"height:2em\"\n| colspan=3 | ''Vacant''\n| nowrap | December 6, 1869 –
January 18, 1870\n\n|- style=\"height:2em\"\n! 3\n| align=left | [[File:James B. Howell - History of Iowa.jpg|100px]]
'''[[James B. Howell]]\n| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| nowrap | January 18, 1870 –
March 3, 1871\n| [[United States Senate special election in Iowa, 1870|Elected to finish Grimes's term]].
Retired.\n\n|- style=\"height:2em\"\n! rowspan=3 | 4\n| rowspan=3 align=left | [[File:George Grover Wright.jpg|100px]]
'''[[George G. Wright]]\n| rowspan=3 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=3 nowrap | March 4, 1871 –
March 3, 1877\n| rowspan=3 | [[United States Senate election in Iowa, 1870|Elected in 1870]].
Retired.\n| rowspan=3 | 5\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"42"}},"i":16}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"43"}},"i":17}},"\n| rowspan=3 | 6\n| rowspan=3 | [[United States Senate election in Iowa, 1872|Elected January 17, 1872]].",{"template":{"target":{"wt":"sfn ","href":"./Template:Sfn"},"params":{"1":{"wt":" Clark "},"p":{"wt":"167"}},"i":18}},"\n| rowspan=21 nowrap | March 4, 1873 –
August 4, 1908\n| rowspan=21 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=21 align=right | [[File:William B. Allison - Brady-Handy.jpg|100px]]
'''[[William B. Allison]]\n! rowspan=21 | 5\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"44"}},"i":19}},"\n\n|- style=\"height:2em\"\n! rowspan=3 | 5\n| rowspan=3 align=left | [[File:Samuel Jordan Kirkwood.jpg|100px]]
'''[[Samuel J. Kirkwood]]\n| rowspan=3 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=3 nowrap | March 4, 1877 –
March 7, 1881\n| rowspan=3 | Elected in 1876 or 1877.
Resigned to become [[United States Secretary of the Interior|U.S. Secretary of the Interior]].\n| rowspan=4 | 6\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"45"}},"i":20}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"46"}},"i":21}},"\n| rowspan=4 | 7\n| rowspan=4 | [[United States Senate election in Iowa, 1878|Re-elected January 23, 1878]].Clark, p. 185: Allison 104 votes, [[Daniel F. Miller]] 35 votes, [[E. N. Gates]] 3 votes.\n\n|- style=\"height:2em\"\n| rowspan=2 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"47"}},"i":22}},"\n\n|- style=\"height:2em\"\n! 6\n| align=left | [[File:James W. McDill - Brady-Handy.jpg|100px]]
'''[[James W. McDill]]\n| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| nowrap | March 8, 1881 –
March 3, 1883\n| Appointed to continue Kirkwood's term.
[[United States Senate special election in Iowa, 1882|Elected January 25, 1882 to finish Kirkwood's term]].Clark, p. 199: [[M. M. Ham]] and [[Daniel Campbell (Iowa politician)|Daniel Campbell]] lost.
Retired.\n\n|- style=\"height:2em\"\n! rowspan=6 | 7\n| rowspan=6 align=left | [[File:James Falconer Wilson - Brady-Handy.jpg|100px]]
'''[[James F. Wilson]]\n| rowspan=6 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=6 nowrap | March 4, 1883 –
March 3, 1895\n| rowspan=3 | [[United States Senate election in Iowa, 1882|Elected January 25, 1882]].Clark, p. 199: [[L. G. Kinne]] and [[D. P. Stubbs]] lost.\n| rowspan=3 | 7\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"48"}},"i":23}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"49"}},"i":24}},"\n| rowspan=3 | 8\n| rowspan=3 | [[United States Senate election in Iowa, 1884|Re-elected January 23, 1884]].Clark, p. 209: Allison 90 votes, [[Benton J. Hall]] 48 votes, [[D. M. Clark]] 10 votes, [[L. G. Kinne]] 1 vote.\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"50"}},"i":25}},"\n\n|- style=\"height:2em\"\n| rowspan=3 | [[United States Senate election in Iowa, 1888|Re-elected in 1888]].
Retired.\n| rowspan=3 | 8\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"51"}},"i":26}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"52"}},"i":27}},"\n| rowspan=3 | 9\n| rowspan=3 | [[United States Senate election in Iowa, 1890|Re-elected March 5, 1890]].Clark, p. 221: Allison 79 votes, [[S.T. Bestow]] (Democratic) 63 votes, [[William Larrabee (Iowa)|William Larrabee]] 8 votes.\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"53"}},"i":28}},"\n\n|- style=\"height:2em\"\n! rowspan=3 | 8\n| rowspan=3 align=left | [[File:John Henry Gear - Senator.jpg|100px]]
'''[[John H. Gear]]\n| rowspan=3 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=3 nowrap | March 4, 1895 –
July 14, 1900\n| rowspan=3 | [[United States Senate election in Iowa, 1894|Elected January 17, 1894]].Clark, p. 234: Gear beat Democrat [[Horace Boies]] by votes unknown.
[[United States Senate election in Iowa, 1900|Re-elected January 17, 1900]],Clark, p. 245: Gear 111 votes, [[Fred E. White]] (Democratic) 32 votes but died.\n| rowspan=5 | 9\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"54"}},"i":29}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"55"}},"i":30}},"\n| rowspan=5 | 10\n| rowspan=5 | [[United States Senate election in Iowa, 1896|Re-elected January 22, 1896]].Clark, p. 238: Allison 118 votes, [[Washington I. Babb]] (Democratic) 25 votes, [[Frank Q. Stuart]] 1 vote.\n\n|- style=\"height:2em\"\n| rowspan=3 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"56"}},"i":31}},"\n\n|- style=\"height:2em\"\n| colspan=3 | ''Vacant''\n| nowrap | July 14, 1900 –
August 22, 1900\n\n|- style=\"height:2em\"\n! rowspan=8 | 9\n| rowspan=8 align=left | [[File:Jonathan P. Dolliver - History of Iowa.jpg|100px]]
'''[[Jonathan P. Dolliver]]\n| rowspan=8 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=8 nowrap | August 22, 1900 –
October 15, 1910\n| Appointed to finish Gear's term.\n\n|- style=\"height:2em\"\n| rowspan=3 | Appointed to begin the vacant term.
[[United States Senate special election in Iowa, 1902|Elected January 22, 1902 to finish the vacant term.]]Clark, p. 247: Dolliver 119 votes, [[John J. Seerley]] (Democratic) 20 votes.\n| rowspan=3 | 10\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"57"}},"i":32}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"58"}},"i":33}},"\n| rowspan=5 | 11\n| rowspan=3 | [[United States Senate election in Iowa, 1902|Re-elected January 22, 1902]].Clark, p. 247: Allison 119 votes, [[E. H. Thayer]] (Democratic) 20 votes.
Renominated in 1908 but died before the general election.\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"59"}},"i":34}},"\n\n|- style=\"height:2em\"\n| rowspan=4 | [[United States Senate election in Iowa, 1907|Re-elected January 23, 1907]].
Died.\n| rowspan=8 | 11\n| rowspan=3 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"60"}},"i":35}},"\n\n|- style=\"height:2em\"\n| \n| nowrap | August 4, 1908 –
November 24, 1908\n| colspan=3 | ''Vacant''\n\n|- style=\"height:2em\"\n| [[United States Senate special election in Iowa, 1908|Elected to finish Allison's term]].\n| rowspan=16 nowrap | November 24, 1908 –
July 30, 1926\n| rowspan=16 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=16 align=right | [[File:Albert B Cummins.jpg|100px]]
'''[[Albert B. Cummins]]\n! rowspan=16 | 6\n\n|- style=\"height:2em\"\n| rowspan=4 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"61"}},"i":36}},"\n| rowspan=6 | 12\n| rowspan=6 | [[United States Senate election in Iowa, 1909|Re-elected January 19, 1909]].\n\n|- style=\"height:2em\"\n| colspan=3 | ''Vacant''\n| nowrap | October 15, 1910 –
November 12, 1910\n\n|- style=\"height:2em\"\n! 10\n| align=left | [[File:SenatorLafayetteYoung.jpg|100px]]
'''[[Lafayette Young]]\n| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| nowrap | November 12, 1910 –
April 11, 1911\n| Appointed to continue Dolliver's term.
Lost election to finish Dolliver's term.\n\n|- style=\"height:2em\"\n! rowspan=7 | 11\n| rowspan=7 align=left | [[File:William Squire Kenyon.jpg|100px]]
'''[[William S. Kenyon (Iowa politician)|William S. Kenyon]]\n| rowspan=7 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=7 nowrap | April 12, 1911 –
February 24, 1922\n| rowspan=2 | [[United States Senate special election in Iowa, 1911|Elected to finish Dolliver's term]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"62"}},"i":37}},"\n\n|- style=\"height:2em\"\n| rowspan=3 | [[United States Senate election in Iowa, 1913|Re-elected January 21, 1913]].\n| rowspan=3 | 12\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"63"}},"i":38}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"64"}},"i":39}},"\n| rowspan=3 | 13\n| rowspan=3 | [[United States Senate election in Iowa, 1914|Re-elected in 1914]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"65"}},"i":40}},"\n\n|- style=\"height:2em\"\n| rowspan=2 | [[United States Senate election in Iowa, 1918|Re-elected in 1918]].
Resigned to become Judge of the [[United States Court of Appeals for the Eighth Circuit|U.S. Court of Appeals]].\n| rowspan=5 | 13\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"66"}},"i":41}},"\n\n|- style=\"height:2em\"\n| rowspan=3 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"67"}},"i":42}},"\n| rowspan=8 | 14\n| rowspan=6 | [[United States Senate election in Iowa, 1920|Re-elected in 1920]].
Lost renomination, then died.\n\n|- style=\"height:2em\"\n! 12\n| align=left | [[File:Charles A Rawson - US Senator.jpg|100px]]
'''[[Charles A. Rawson]]\n| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| nowrap | February 24, 1922 –
December 1, 1922\n| Appointed to continue Kenyon's term.
Retired when his successor was elected.\n\n|- style=\"height:2em\"\n! rowspan=3 | 13\n| rowspan=3 align=left | [[File:Smith Wildman Brookhart.jpg|100px]]
'''[[Smith W. Brookhart]]\n| rowspan=3 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=3 nowrap | December 1, 1922 –
April 12, 1926\n| rowspan=2 | [[United States Senate special election in Iowa, 1922|Elected to finish Kenyon's term]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"68"}},"i":43}},"\n\n|- style=\"height:2em\"\n| [[United States Senate election in Iowa, 1924|Re-elected in 1924]].
Lost election challenge.\n| rowspan=6 | 14\n| rowspan=4 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"69"}},"i":44}},"\n\n|- style=\"height:2em\"\n! rowspan=5 | 14\n| rowspan=5 align=left | [[File:Daniel Steck.jpg|100px]]
'''[[Daniel F. Steck]]\n| rowspan=5 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=5 nowrap | April 12, 1926 –
March 3, 1931\n| rowspan=5 | Successfully challenged his predecessor's election.
Lost re-election.\n\n|- style=\"height:2em\"\n| \n| nowrap | July 30, 1926 –
August 7, 1926\n| colspan=3 | ''Vacant''\n\n|- style=\"height:2em\"\n| Appointed to continue Cummins's term.
[[United States Senate special election in Iowa, 1926|Elected on November 10, 1926 to finish Cummins's term]].",{"template":{"target":{"wt":"sfn ","href":"./Template:Sfn"},"params":{"1":{"wt":" Byrd "},"p":{"wt":"107"}},"i":45}},"
Retired.\n| nowrap | August 7, 1926 –
March 3, 1927\n| {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| align=right | [[File:David Wallace Stewart.jpg|100px]]
'''[[David W. Stewart]]\n! 7\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"70"}},"i":46}},"\n| rowspan=3 | 15\n| rowspan=3 | [[United States Senate election in Iowa, 1926|Elected in 1926]].
Lost renomination and then lost re-election as an Independent.\n| rowspan=3 nowrap | March 4, 1927 –
March 3, 1933\n| rowspan=3 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=3 align=right | [[File:Smith Wildman Brookhart.jpg|100px]]
'''[[Smith W. Brookhart]]\n! rowspan=3 | 8\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"71"}},"i":47}},"\n\n|- style=\"height:2em\"\n! rowspan=5 | 15\n| rowspan=5 align=left | [[File:LJDickinson.jpg|100px]]
'''[[Lester J. Dickinson]]\n| rowspan=5 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=5 nowrap | March 4, 1931 –
January 3, 1937\n| rowspan=5 | [[United States Senate election in Iowa, 1930|Elected in 1930]].
Lost re-election.\n| rowspan=5 | 15\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"72"}},"i":48}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"73"}},"i":49}},"\n| rowspan=5 | 16\n| rowspan=2 | [[United States Senate election in Iowa, 1932|Elected in 1932]].
Died.\n| rowspan=2 nowrap | March 4, 1933 –
July 16, 1936\n| rowspan=2 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=2 align=right | [[File:SenatorRLouisMurphy.jpg|100px]]
'''[[Richard L. Murphy]]\n! rowspan=2 | 9\n\n|- style=\"height:2em\"\n| rowspan=3 ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"74"}},"i":50}},"\n\n|- style=\"height:2em\"\n| \n| nowrap | July 16, 1936 –
November 3, 1936\n| colspan=3 | ''Vacant''\n\n|- style=\"height:2em\"\n| rowspan=2 | [[United States Senate special election in Iowa, 1936|Elected to finish Murphy's term]].\n| rowspan=5 nowrap | November 3, 1936 –
January 3, 1945\n| rowspan=5 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=5 align=right | [[File:Guy Mark Gillette.jpg|100px]]
'''[[Guy Gillette]]\n! rowspan=5 | 10\n\n|- style=\"height:2em\"\n! rowspan=3 | 16\n| rowspan=3 align=left | [[File:Clyde L. Herring, US Senator.jpg|100px]]
'''[[Clyde L. Herring]]\n| rowspan=3 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=3 nowrap | January 3, 1937 –
January 3, 1943\n| rowspan=3 | [[United States Senate election in Iowa, 1936|Elected in 1936]].
Didn't take seat until January 15, 1937 as he wanted to remain [[Governor of Iowa]]. However, he was still elected and qualified as senator.
Lost re-election.\n| rowspan=3 | 16\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"75"}},"i":51}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"76"}},"i":52}},"\n| rowspan=3 | 17\n| rowspan=3 | [[United States Senate election in Iowa, 1938|Re-elected in 1938]].
Lost re-election.\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"77"}},"i":53}},"\n\n|- style=\"height:2em\"\n\n|- style=\"height:2em\"\n! rowspan=3 | 17\n| rowspan=3 align=left | [[File:George Allison Wilson.jpg|100px]]
'''[[George A. Wilson]]\n| rowspan=3 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=3 nowrap | January 3, 1943 –
January 3, 1949\n| rowspan=3 | [[United States Senate election in Iowa, 1942|Elected in 1942]].
Didn't take seat until January 14, 1943 as he wanted to remain [[Governor of Iowa]]. However, he was still elected and qualified as senator.
Lost re-election.\n| rowspan=3 | 17\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"78"}},"i":54}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"79"}},"i":55}},"\n| rowspan=3 | 18\n| rowspan=3 | [[United States Senate election in Iowa, 1944|Elected in 1944]].\n| rowspan=12 nowrap | January 3, 1945 –
January 3, 1969\n| rowspan=12 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=12 align=right | [[File:Bourke B. Hickenlooper.jpg|100px]]
'''[[Bourke B. Hickenlooper]]\n! rowspan=12 | 11\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"80"}},"i":56}},"\n\n|- style=\"height:2em\"\n! rowspan=3 | 18\n| rowspan=3 align=left | [[File:Guy Mark Gillette.jpg|100px]]
'''[[Guy Gillette]]\n| rowspan=3 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=3 nowrap | January 3, 1949 –
January 3, 1955\n| rowspan=3 | [[United States Senate election in Iowa, 1948|Elected in 1948]].
Lost re-election.\n| rowspan=3 | 18\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"81"}},"i":57}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"82"}},"i":58}},"\n| rowspan=3 | 19\n| rowspan=3 | [[United States Senate election in Iowa, 1950|Re-elected in 1950]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"83"}},"i":59}},"\n\n|- style=\"height:2em\"\n! rowspan=3 | 19\n| rowspan=3 align=left | [[File:Thomas Ellsworth Martin.jpg|100px]]
'''[[Thomas E. Martin]]\n| rowspan=3 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=3 nowrap | January 3, 1955 –
January 3, 1961\n| rowspan=3 | [[United States Senate election in Iowa, 1954|Elected in 1954]].
Retired.\n| rowspan=3 | 19\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"84"}},"i":60}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"85"}},"i":61}},"\n| rowspan=3 | 20\n| rowspan=3 | [[United States Senate election in Iowa, 1956|Re-elected in 1956]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"86"}},"i":62}},"\n\n|- style=\"height:2em\"\n! rowspan=6 | 20\n| rowspan=6 align=left | [[File:SenatorJackMillerIA.jpg|100px]]
'''[[Jack Miller (politician)|Jack Miller]]\n| rowspan=6 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=6 nowrap | January 3, 1961 –
January 3, 1973\n| rowspan=3 | [[United States Senate election in Iowa, 1960|Elected in 1960]].\n| rowspan=3 | 20\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"87"}},"i":63}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"88"}},"i":64}},"\n| rowspan=3 | 21\n| rowspan=3 | [[United States Senate election in Iowa, 1962|Re-elected in 1962]]
Retired.\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"89"}},"i":65}},"\n\n|- style=\"height:2em\"\n| rowspan=3 | [[United States Senate election in Iowa, 1966|Re-elected in 1966]].
Lost re-election.\n| rowspan=3 | 21\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"90"}},"i":66}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"91"}},"i":67}},"\n| rowspan=3 | 22\n| rowspan=3 | [[United States Senate election in Iowa, 1968|Elected in 1968]].
Retired.\n| rowspan=3 nowrap | January 3, 1969 –
January 3, 1975\n| rowspan=3 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=3 align=right | [[File:Harold Hughes, US Senator.jpg|100px]]
'''[[Harold Hughes]]\n! rowspan=3 | 12\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"92"}},"i":68}},"\n\n|- style=\"height:2em\"\n! rowspan=3 | 21\n| rowspan=3 align=left | [[File:Senator dick clark.jpg|100px]]
'''[[Dick Clark (senator)|Dick Clark]]\n| rowspan=3 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=3 nowrap | January 3, 1973 –
January 3, 1979\n| rowspan=3 | [[United States Senate election in Iowa, 1972|Elected in 1972]].
Lost re-election.\n| rowspan=3 | 22\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"93"}},"i":69}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"94"}},"i":70}},"\n| rowspan=3 | 23\n| rowspan=3 | [[United States Senate election in Iowa, 1974|Elected in 1974]].
Lost re-election.\n| rowspan=3 nowrap | January 3, 1975 –
January 3, 1981\n| rowspan=3 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=3 align=right | [[File:John Culver.jpg|100px]]
'''[[John Culver]]\n! rowspan=3 | 13\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"95"}},"i":71}},"\n\n|- style=\"height:2em\"\n! rowspan=3 | 22\n| rowspan=3 align=left | [[File:Roger Jepsen.JPG|100px]]
'''[[Roger Jepsen]]\n| rowspan=3 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=3 nowrap | January 3, 1979 –
January 3, 1985\n| rowspan=3 | [[United States Senate election in Iowa, 1978|Elected in 1978]].
Lost re-election.\n| rowspan=3 | 23\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"96"}},"i":72}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"97"}},"i":73}},"\n| rowspan=3 | 24\n| rowspan=3 | [[United States Senate election in Iowa, 1980|Elected in 1980]].\n| rowspan=21 nowrap | January 3, 1981 –
Present\n| rowspan=21 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=21 align=right | [[File:Sen Chuck Grassley official.jpg|100px]]
'''[[Chuck Grassley]]\n! rowspan=21 | 14\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"98"}},"i":74}},"\n\n|- style=\"height:2em\"\n! rowspan=15 | 23\n| rowspan=15 align=left | [[File:Tom Harkin official portrait.jpg|100px]]
'''[[Tom Harkin]]\n| rowspan=15 {{Party shading/Democratic}} | [[Democratic Party (United States)|Democratic]]\n| rowspan=15 nowrap | January 3, 1985 –
January 3, 2015\n| rowspan=3 | [[United States Senate election in Iowa, 1984|Elected in 1984]].\n| rowspan=3 | 24\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"99"}},"i":75}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"100"}},"i":76}},"\n| rowspan=3 | 25\n| rowspan=3 | [[United States Senate election in Iowa, 1986|Re-elected in 1986]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"101"}},"i":77}},"\n\n|- style=\"height:2em\"\n| rowspan=3 | [[United States Senate election in Iowa, 1990|Re-elected in 1990]].\n| rowspan=3 | 25\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"102"}},"i":78}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"103"}},"i":79}},"\n| rowspan=3 | 26\n| rowspan=3 | [[United States Senate election in Iowa, 1992|Re-elected in 1992]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"104"}},"i":80}},"\n\n|- style=\"height:2em\"\n| rowspan=3 | [[United States Senate election in Iowa, 1996|Re-elected in 1996]].\n| rowspan=3 | 26\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"105"}},"i":81}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"106"}},"i":82}},"\n| rowspan=3 | 27\n| rowspan=3 | [[United States Senate election in Iowa, 1998|Re-elected in 1998]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"107"}},"i":83}},"\n\n|- style=\"height:2em\"\n| rowspan=3 | [[United States Senate election in Iowa, 2002|Re-elected in 2002]].\n| rowspan=3 | 27\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"108"}},"i":84}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"109"}},"i":85}},"\n| rowspan=3 | 28\n| rowspan=3 | [[United States Senate election in Iowa, 2004|Re-elected in 2004]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"110"}},"i":86}},"\n\n|- style=\"height:2em\"\n| rowspan=3 | [[United States Senate election in Iowa, 2008|Re-elected in 2008]]
Retired.\n| rowspan=3 | 28\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"111"}},"i":87}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"112"}},"i":88}},"\n| rowspan=3 | 29\n| rowspan=3 | [[United States Senate election in Iowa, 2010|Re-elected in 2010]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"113"}},"i":89}},"\n\n|- style=\"height:2em\"\n! rowspan=3 | 24\n| rowspan=3 align=left | [[File:Joni Ernst Official photo portrait 114th Congress.jpg|100px]]
'''[[Joni Ernst]]\n| rowspan=3 {{Party shading/Republican}} | [[Republican Party (United States)|Republican]]\n| rowspan=3 nowrap | January 3, 2015 –
Present\n| rowspan=3 | [[United States Senate election in Iowa, 2014|Elected in 2014]].\n| rowspan=3 | 29\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"114"}},"i":90}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"115"}},"i":91}},"\n| rowspan=3 | 39\n| rowspan=3 | [[United States Senate election in Iowa, 2016|Re-elected in 2016]].\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"116"}},"i":92}},"\n\n|- style=\"height:2em\"\n| rowspan=2 colspan=5 | To be decided in the [[United States Senate election in Iowa, 2020|2020 election]].\n| rowspan=2 | 30\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"117"}},"i":93}},"\n\n|- style=\"height:2em\"\n| ",{"template":{"target":{"wt":"List of United States Senators Congress","href":"./Template:List_of_United_States_Senators_Congress"},"params":{"1":{"wt":"118"}},"i":94}},"\n| 31\n| colspan=5 | To be decided in the [[United States Senate election in Iowa, 2022|2022 election]].\n\n",{"template":{"target":{"wt":"List of United States Senators footer ","href":"./Template:List_of_United_States_Senators_footer"},"params":{"Left_class":{"wt":"2"},"Right_class":{"wt":"3"}},"i":95}}]}" id="mwEA">
Class 2 Class 2 U.S. Senators belong to the electoral cycle that were elected for two U.S. Congresses in the first elections of 1848, and then the seat was contested every three Congresses (six years) thereafter. The seat in recent years have been contested in 1996, 2002, 2008, and 2014. The next election will be in 2020. | C o n g r e s s | Class 3 Class 3 U.S. Senators belong to the electoral cycle that were elected for one United States Congress in the first elections of 1848, and then the seat was contested every three Congresses (six years) thereafter. The seat in recent years have been contested in 1998, 2004, 2010 and 2016. The next election will be in 2022. | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
# | Senator | Party | Years in office | Electoral history | T e r m | T e r m | Electoral history | Years in office | Party | Senator | # | |
Vacant | December 28, 1846 – December 7, 1848 | Legislature failed to elect due to a three-way split that prevented any candidate from earning the required number of 30 legislators' votes. [1] | — | 29th | — | Legislature failed to elect due to a three-way split that prevented any candidate from earning the required number of 30 legislators' votes. [1] | December 28, 1846 – December 7, 1848 | Vacant | ||||
30th | ||||||||||||
1 | ![]() George W. Jones | Democratic | December 7, 1848 – March 3, 1859 | Elected in 1848. | 1 | 1 | Elected in 1848. | December 7, 1848 – February 22, 1855 | Democratic | ![]() Augustus C. Dodge | 1 | |
31st | 2 | Re-elected in 1849. Resigned to become U.S. Minister to Spain, having lost re-election. | ||||||||||
32nd | ||||||||||||
Re-elected in 1852. Lost renomination. | 2 | 33rd | ||||||||||
February 22, 1855 – March 3, 1855 | Vacant | |||||||||||
34th | 3 | Elected in 1855. Elected invalidated, as the Iowa Senate had not participated in it. | March 4, 1855 – January 5, 1857 | Free Soil | ![]() James Harlan | 2 | ||||||
January 5, 1857 – January 29, 1857 | Vacant | |||||||||||
Re-elected to finish his vacant term. | January 29, 1857 – May 15, 1865 | Republican | ![]() James Harlan | |||||||||
35th | ||||||||||||
2 | ![]() James W. Grimes | Republican | March 4, 1859 – December 6, 1869 | Elected in 1858. | 3 | 36th | ||||||
37th | 4 | Re-elected in 1860. Resigned to become U.S. Secretary of the Interior. | ||||||||||
38th | ||||||||||||
Re-elected in 1864. Resigned due to ill health. | 4 | 39th | ||||||||||
May 15, 1865 – January 13, 1866 | Vacant | |||||||||||
Elected to finish Harlan's term. [2] Lost nomination for the next term. | January 13, 1866 – March 3, 1867 | Republican | ![]() Samuel J. Kirkwood | 3 | ||||||||
40th | 5 | Elected January 13, 1866. [3] Lost re-election. | March 4, 1867 – March 3, 1873 | Republican | ![]() James Harlan | 4 | ||||||
41st | ||||||||||||
Vacant | December 6, 1869 – January 18, 1870 | |||||||||||
3 | ![]() James B. Howell | Republican | January 18, 1870 – March 3, 1871 | Elected to finish Grimes's term. Retired. | ||||||||
4 | ![]() George G. Wright | Republican | March 4, 1871 – March 3, 1877 | Elected in 1870. Retired. | 5 | 42nd | ||||||
43rd | 6 | Elected January 17, 1872. [4] | March 4, 1873 – August 4, 1908 | Republican | ![]() William B. Allison | 5 | ||||||
44th | ||||||||||||
5 | ![]() Samuel J. Kirkwood | Republican | March 4, 1877 – March 7, 1881 | Elected in 1876 or 1877. Resigned to become U.S. Secretary of the Interior. | 6 | 45th | ||||||
46th | 7 | Re-elected January 23, 1878. [5] | ||||||||||
47th | ||||||||||||
6 | ![]() James W. McDill | Republican | March 8, 1881 – March 3, 1883 | Appointed to continue Kirkwood's term. Elected January 25, 1882 to finish Kirkwood's term. [6] Retired. | ||||||||
7 | ![]() James F. Wilson | Republican | March 4, 1883 – March 3, 1895 | Elected January 25, 1882. [7] | 7 | 48th | ||||||
49th | 8 | Re-elected January 23, 1884. [8] | ||||||||||
50th | ||||||||||||
Re-elected in 1888. Retired. | 8 | 51st | ||||||||||
52nd | 9 | Re-elected March 5, 1890. [9] | ||||||||||
53rd | ||||||||||||
8 | ![]() John H. Gear | Republican | March 4, 1895 – July 14, 1900 | Elected January 17, 1894. [10] Re-elected January 17, 1900, [11] but died. | 9 | 54th | ||||||
55th | 10 | Re-elected January 22, 1896. [12] | ||||||||||
56th | ||||||||||||
Vacant | July 14, 1900 – August 22, 1900 | |||||||||||
9 | ![]() Jonathan P. Dolliver | Republican | August 22, 1900 – October 15, 1910 | Appointed to finish Gear's term. | ||||||||
Appointed to begin the vacant term. Elected January 22, 1902 to finish the vacant term. [13] | 10 | 57th | ||||||||||
58th | 11 | Re-elected January 22, 1902. [14] Renominated in 1908 but died before the general election. | ||||||||||
59th | ||||||||||||
Re-elected January 23, 1907. Died. | 11 | 60th | ||||||||||
August 4, 1908 – November 24, 1908 | Vacant | |||||||||||
Elected to finish Allison's term. | November 24, 1908 – July 30, 1926 | Republican | ![]() Albert B. Cummins | 6 | ||||||||
61st | 12 | Re-elected January 19, 1909. | ||||||||||
Vacant | October 15, 1910 – November 12, 1910 | |||||||||||
10 | ![]() Lafayette Young | Republican | November 12, 1910 – April 11, 1911 | Appointed to continue Dolliver's term. Lost election to finish Dolliver's term. | ||||||||
11 | ![]() William S. Kenyon | Republican | April 12, 1911 – February 24, 1922 | Elected to finish Dolliver's term. | ||||||||
62nd | ||||||||||||
Re-elected January 21, 1913. | 12 | 63rd | ||||||||||
64th | 13 | Re-elected in 1914. | ||||||||||
65th | ||||||||||||
Re-elected in 1918. Resigned to become Judge of the U.S. Court of Appeals. | 13 | 66th | ||||||||||
67th | 14 | Re-elected in 1920. Lost renomination, then died. | ||||||||||
12 | ![]() Charles A. Rawson | Republican | February 24, 1922 – December 1, 1922 | Appointed to continue Kenyon's term. Retired when his successor was elected. | ||||||||
13 | ![]() Smith W. Brookhart | Republican | December 1, 1922 – April 12, 1926 | Elected to finish Kenyon's term. | ||||||||
68th | ||||||||||||
Re-elected in 1924. Lost election challenge. | 14 | 69th | ||||||||||
14 | ![]() Daniel F. Steck | Democratic | April 12, 1926 – March 3, 1931 | Successfully challenged his predecessor's election. Lost re-election. | ||||||||
July 30, 1926 – August 7, 1926 | Vacant | |||||||||||
Appointed to continue Cummins's term. Elected on November 10, 1926 to finish Cummins's term. [15] Retired. | August 7, 1926 – March 3, 1927 | Republican | ![]() David W. Stewart | 7 | ||||||||
70th | 15 | Elected in 1926. Lost renomination and then lost re-election as an Independent. | March 4, 1927 – March 3, 1933 | Republican | ![]() Smith W. Brookhart | 8 | ||||||
71st | ||||||||||||
15 | ![]() Lester J. Dickinson | Republican | March 4, 1931 – January 3, 1937 | Elected in 1930. Lost re-election. | 15 | 72nd | ||||||
73rd | 16 | Elected in 1932. Died. | March 4, 1933 – July 16, 1936 | Democratic | ![]() Richard L. Murphy | 9 | ||||||
74th | ||||||||||||
July 16, 1936 – November 3, 1936 | Vacant | |||||||||||
Elected to finish Murphy's term. | November 3, 1936 – January 3, 1945 | Democratic | ![]() Guy Gillette | 10 | ||||||||
16 | ![]() Clyde L. Herring | Democratic | January 3, 1937 – January 3, 1943 | Elected in 1936. Didn't take seat until January 15, 1937 as he wanted to remain Governor of Iowa. However, he was still elected and qualified as senator. Lost re-election. | 16 | 75th | ||||||
76th | 17 | Re-elected in 1938. Lost re-election. | ||||||||||
77th | ||||||||||||
17 | ![]() George A. Wilson | Republican | January 3, 1943 – January 3, 1949 | Elected in 1942. Didn't take seat until January 14, 1943 as he wanted to remain Governor of Iowa. However, he was still elected and qualified as senator. Lost re-election. | 17 | 78th | ||||||
79th | 18 | Elected in 1944. | January 3, 1945 – January 3, 1969 | Republican | ![]() Bourke B. Hickenlooper | 11 | ||||||
80th | ||||||||||||
18 | ![]() Guy Gillette | Democratic | January 3, 1949 – January 3, 1955 | Elected in 1948. Lost re-election. | 18 | 81st | ||||||
82nd | 19 | Re-elected in 1950. | ||||||||||
83rd | ||||||||||||
19 | ![]() Thomas E. Martin | Republican | January 3, 1955 – January 3, 1961 | Elected in 1954. Retired. | 19 | 84th | ||||||
85th | 20 | Re-elected in 1956. | ||||||||||
86th | ||||||||||||
20 | ![]() Jack Miller | Republican | January 3, 1961 – January 3, 1973 | Elected in 1960. | 20 | 87th | ||||||
88th | 21 | Re-elected in 1962 Retired. | ||||||||||
89th | ||||||||||||
Re-elected in 1966. Lost re-election. | 21 | 90th | ||||||||||
91st | 22 | Elected in 1968. Retired. | January 3, 1969 – January 3, 1975 | Democratic | ![]() Harold Hughes | 12 | ||||||
92nd | ||||||||||||
21 | ![]() Dick Clark | Democratic | January 3, 1973 – January 3, 1979 | Elected in 1972. Lost re-election. | 22 | 93rd | ||||||
94th | 23 | Elected in 1974. Lost re-election. | January 3, 1975 – January 3, 1981 | Democratic | ![]() John Culver | 13 | ||||||
95th | ||||||||||||
22 | Roger Jepsen | Republican | January 3, 1979 – January 3, 1985 | Elected in 1978. Lost re-election. | 23 | 96th | ||||||
97th | 24 | Elected in 1980. | January 3, 1981 – Present | Republican | ![]() Chuck Grassley | 14 | ||||||
98th | ||||||||||||
23 | ![]() Tom Harkin | Democratic | January 3, 1985 – January 3, 2015 | Elected in 1984. | 24 | 99th | ||||||
100th | 25 | Re-elected in 1986. | ||||||||||
101st | ||||||||||||
Re-elected in 1990. | 25 | 102nd | ||||||||||
103rd | 26 | Re-elected in 1992. | ||||||||||
104th | ||||||||||||
Re-elected in 1996. | 26 | 105th | ||||||||||
106th | 27 | Re-elected in 1998. | ||||||||||
107th | ||||||||||||
Re-elected in 2002. | 27 | 108th | ||||||||||
109th | 28 | Re-elected in 2004. | ||||||||||
110th | ||||||||||||
Re-elected in 2008 Retired. | 28 | 111th | ||||||||||
112th | 29 | Re-elected in 2010. | ||||||||||
113th | ||||||||||||
24 | ![]() Joni Ernst | Republican | January 3, 2015 – Present | Elected in 2014. | 29 | 114th | ||||||
115th | 39 | Re-elected in 2016. | ||||||||||
116th | ||||||||||||
To be decided in the 2020 election. | 30 | 117th | ||||||||||
118th | 31 | To be decided in the 2022 election. | ||||||||||
# | Senator | Party | Years in office | Electoral history | T e r m | T e r m | Electoral history | Years in office | Party | Senator | # | |
Class 2 | Class 3 |
As of January 2019 [update] , there are three living former U.S. Senators from Iowa. The most recent to die was John Culver (served 1975–1981) on December 26, 2018, who was also the most recently serving to die.
Senator | Term of office | Date of birth (and age) |
---|---|---|
Dick Clark | 1973–1979 | September 14, 1928 |
Roger Jepsen | 1979–1985 | December 23, 1928 |
Tom Harkin | 1985–2015 | November 19, 1939 |
Robert Carlyle Byrd was an American politician who served as a United States Senator from West Virginia for over 51 years, from 1959 until his death in 2010. A member of the Democratic Party, Byrd previously served as a U.S. Representative from 1953 until 1959. He is the longest-serving U.S. Senator in history. In addition, he was, at the time of his death, the longest-serving member in the history of the United States Congress, a record later surpassed by Representative John Dingell of Michigan. Byrd was the last remaining member of the U.S. Senate to have served during the presidency of Dwight Eisenhower, and the last remaining member of Congress to have served during the presidency of Harry S. Truman. Byrd is also the only West Virginian to have served in both chambers of the state legislature and both chambers of Congress.
Washington, D.C., formally the District of Columbia and commonly referred to as Washington or D.C., is the capital of the United States. Founded after the American Revolution as the seat of government of the newly independent country, Washington was named after George Washington, the first president of the United States and a Founding Father. As the seat of the United States federal government and several international organizations, Washington is an important world political capital. The city, located on the Potomac River bordering Maryland and Virginia, is one of the most visited cities in the world, with more than 20 million tourists annually.
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