List of United States senators in the 115th Congress by seniority

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This is a complete list of United States senators during the 115th United States Congress listed by seniority, from January 3, 2017, to January 3, 2019. It is a historical listing and will contain people who have not served the entire two-year Congress on account of resignations, deaths, or expulsions.

Contents

In this Congress, Bill Cassidy is the most junior senior senator. Jeff Sessions was the most senior junior senator at the start of this Congress, but resigned on February 8, 2017, to become United States Attorney General. Maria Cantwell has remained the most senior junior senator since.

Order of service is based on the commencement of the senator's first term. Behind this is former service as a senator (only giving the senator seniority within his or her new incoming class), service as vice president, a House member, a cabinet secretary, or a governor of a state. The final factor is the population of the senator's state. [1] [2] [3] [4] [5]

U.S. Senate seniority list

RankHistorical
rank		SenatorPartyStateSeniority dateOther factors
11692 Patrick Leahy Democratic Vermont January 3, 1975 
21708 Orrin Hatch Republican Utah January 3, 1977
31719 Thad Cochran [6] Republican Mississippi December 27, 1978
41743 Chuck Grassley Republican Iowa January 3, 1981
51766 Mitch McConnell Republican Kentucky January 3, 1985
61775 Richard Shelby Republican Alabama January 3, 1987Former member of the U.S. House of Representatives (8 years)
71777 John McCain [7] Republican Arizona Former member of the U.S. House of Representatives (4 years)
81801 Dianne Feinstein Democratic California November 10, 1992 
91810 Patty Murray Democratic Washington January 3, 1993 
101816 Jim Inhofe Republican Oklahoma November 17, 1994
111827 Ron Wyden Democratic Oregon February 6, 1996
121830 Pat Roberts Republican Kansas January 3, 1997Former member of the U.S. House of Representatives (16 years)
131831 Dick Durbin Democratic Illinois Former member of the U.S. House of Representatives (14 years)
141835 Jack Reed Democratic Rhode Island Former member of the U.S. House of Representatives (6 years)
151839 Jeff Sessions [8] Republican Alabama Alabama 22nd in population (1990)
161842 Susan Collins Republican Maine Maine 38th in population (1990)
171843 Mike Enzi Republican Wyoming Wyoming 50th in population (1990)
181844 Chuck Schumer Democratic New York January 3, 1999Former member of the U.S. House of Representatives (18 years)
191846 Mike Crapo Republican Idaho Former member of the U.S. House of Representatives (6 years)
201854 Bill Nelson Democratic Florida January 3, 2001Former member of the U.S. House of Representatives (12 years)
211855 Tom Carper Democratic Delaware Former member of the U.S. House of Representatives (10 years)
221856 Debbie Stabenow Democratic Michigan Former member of the U.S. House of Representatives (4 years)
231859 Maria Cantwell Democratic Washington Former member of the U.S. House of Representatives (2 years)
241873 John Cornyn Republican Texas December 1, 2002 
251867 Lisa Murkowski Republican Alaska December 20, 2002 
261869 Lindsey Graham Republican South Carolina January 3, 2003Former member of the U.S. House of Representatives
271871 Lamar Alexander Republican Tennessee  
281876 Richard Burr Republican North Carolina January 3, 2005Former member of the U.S. House of Representatives (10 years)
291879 John Thune Republican South Dakota Former member of the U.S. House of Representatives (6 years)
301880 Johnny Isakson Republican Georgia Former member of the U.S. House of Representatives (5 years, 10 months)
311885 Bob Menendez Democratic New Jersey January 18, 2006 
321886 Ben Cardin Democratic Maryland January 3, 2007Former member of the U.S. House of Representatives (20 years)
331887 Bernie Sanders Independent Vermont Former member of the U.S. House of Representatives (16 years) [9]
341888 Sherrod Brown Democratic Ohio Former member of the U.S. House of Representatives (14 years)
351890 Bob Casey, Jr. Democratic Pennsylvania Pennsylvania 6th in population (2000)
361891 Bob Corker Republican Tennessee Tennessee 16th in population (2000)
371892 Claire McCaskill Democratic Missouri Missouri 17th in population (2000)
381893 Amy Klobuchar Democratic Minnesota Minnesota 21st in population (2000)
391894 Sheldon Whitehouse Democratic Rhode Island Rhode Island 43rd in population (2000)
401895 Jon Tester Democratic Montana Montana 44th in population (2000)
411896 John Barrasso Republican Wyoming June 25, 2007 
421897 Roger Wicker Republican Mississippi December 31, 2007
431899 Tom Udall Democratic New Mexico January 3, 2009Former member of the U.S. House of Representatives
441901 Jeanne Shaheen Democratic New Hampshire Former governor (6 years)
451902 Mark Warner Democratic Virginia Former governor (4 years)
461903 Jim Risch Republican Idaho Former governor (7 months)
471905 Jeff Merkley Democratic Oregon  
481909 Michael Bennet Democratic Colorado January 21, 2009
491910 Kirsten Gillibrand Democratic New York January 26, 2009
501911 Al Franken [10] Democratic Minnesota July 7, 2009
511916 Joe Manchin Democratic West Virginia November 15, 2010Former governor
521917 Chris Coons Democratic Delaware  
531919 Roy Blunt Republican Missouri January 3, 2011Former member of the U.S. House of Representatives (14 years); Missouri 17th in population (2000)
541920 Jerry Moran Republican Kansas Former member of the U.S. House of Representatives (14 years); Kansas 32nd in population (2000)
551921 Rob Portman Republican Ohio Former member of the U.S. House of Representatives (12 years)
561922 John Boozman Republican Arkansas Former member of the U.S. House of Representatives (9 years)
571923 Pat Toomey Republican Pennsylvania Former member of the U.S. House of Representatives (6 years)
581924 John Hoeven Republican North Dakota Former governor
591925 Marco Rubio Republican Florida Florida 4th in population (2000)
601926 Ron Johnson Republican Wisconsin Wisconsin 18th in population (2000)
611927 Rand Paul Republican Kentucky Kentucky 25th in population (2000)
621928 Richard Blumenthal Democratic Connecticut Connecticut 29th in population (2000)
631929 Mike Lee Republican Utah Utah 34th in population (2000)
641931 Dean Heller Republican Nevada May 9, 2011 
651932 Brian Schatz Democratic Hawaii December 27, 2012
661933 Tim Scott Republican South Carolina January 2, 2013
671934 Tammy Baldwin Democratic Wisconsin January 3, 2013Former member of the U.S. House of Representatives (14 years)
681935 Jeff Flake Republican Arizona Former member of the U.S. House of Representatives (12 years)
691936 Joe Donnelly Democratic Indiana Former member of the U.S. House of Representatives (6 years); Indiana 16th in population (2010)
701937 Chris Murphy Democratic Connecticut Former member of the U.S. House of Representatives (6 years); Connecticut 29th in population (2010)
711938 Mazie Hirono Democratic Hawaii Former member of the U.S. House of Representatives (6 years); Hawaii 42nd in population (2010)
721939 Martin Heinrich Democratic New Mexico Former member of the U.S. House of Representatives (4 years)
731940 Angus King Independent Maine Former governor (8 years)
741941 Tim Kaine Democratic Virginia Former governor (4 years)
751942 Ted Cruz Republican Texas Texas 2nd in population (2010)
761943 Elizabeth Warren Democratic Massachusetts Massachusetts 15th in population (2010)
771944 Deb Fischer Republican Nebraska Nebraska 38th in population (2010)
781945 Heidi Heitkamp Democratic North Dakota North Dakota 48th in population (2010)
791948 Ed Markey Democratic Massachusetts July 16, 2013 
801949 Cory Booker Democratic New Jersey October 31, 2013
811951 Shelley Moore Capito Republican West Virginia January 3, 2015Former member of the U.S. House of Representatives (14 years)
821952 Gary Peters Democratic Michigan Former member of the U.S. House of Representatives (6 years); Michigan 9th in population (2010)
831953 Bill Cassidy Republican Louisiana Former member of the U.S. House of Representatives (6 years); Louisiana 25th in population (2010)
841954 Cory Gardner Republican Colorado Former member of the U.S. House of Representatives (4 years); Colorado 22nd in population (2010)
851955 James Lankford Republican Oklahoma Former member of the U.S. House of Representatives (4 years); Oklahoma 28th in population (2010)
861956 Tom Cotton Republican Arkansas Former member of the U.S. House of Representatives (2 years); Arkansas 32nd in population (2010)
871957 Steve Daines Republican Montana Former member of the U.S. House of Representatives (2 years); Montana 44th in population (2010)
881958 Mike Rounds Republican South Dakota Former governor
891959 David Perdue Republican Georgia Georgia 8th in population (2010)
901960 Thom Tillis Republican North Carolina North Carolina 10th in population (2010)
911961 Joni Ernst Republican Iowa Iowa 30th in population (2010)
921962 Ben Sasse Republican Nebraska Nebraska 37th in population (2010)
931963 Dan Sullivan Republican Alaska Alaska 47th in population (2010)
941964 Chris Van Hollen Democratic Maryland January 3, 2017Former member of the U.S. House of Representatives (14 years)
951965 Todd Young Republican Indiana Former member of the U.S. House of Representatives (6 years)
961966 Tammy Duckworth Democratic Illinois Former member of the U.S. House of Representatives (4 years)
971967 Maggie Hassan Democratic New Hampshire Former governor
981968 Kamala Harris Democratic California California 1st in population (2010)
991969 John Neely Kennedy Republican Louisiana Louisiana 25th in population (2010)
1001970 Catherine Cortez Masto Democratic Nevada Nevada 35th in population (2010)
1971 Luther Strange [8] Republican Alabama February 9, 2017 
1972 Tina Smith [10] Democratic Minnesota January 3, 2018Minnesota 21st in population (2010)
1973 Doug Jones [8] Democratic Alabama Alabama 23rd in population (2010)
1974 Cindy Hyde-Smith [6] Republican Mississippi April 2, 2018
1819 [11] Jon Kyl [7] [12] Republican Arizona September 4, 2018

See also

Notes

  1. ↑ A Chronological List of United States Senators 1789-Present, via www.senate.gov
  2. ↑ 1971 U.S Census Report Contains 1970 Census results.
  3. ↑ 1981 U.S Census Report Contains 1980 Census results.
  4. ↑ 1991 U.S Census Report Contains 1990 Census results.
  5. ↑ "2000 Census State Population Rankings". Archived from the original on 2020-02-12. Retrieved 2016-10-31.
  6. 1 2 In Mississippi, Thad Cochran (R) resigned April 1, 2018. He was replaced April 2, 2018 by Cindy Hyde-Smith (R).
  7. 1 2 In Arizona, John McCain (R) died August 25, 2018. He was replaced September 4, 2018 by Jon Kyl (R).
  8. 1 2 3 In Alabama, Jeff Sessions (R) resigned February 8, 2017. He was replaced February 9, 2017 by Luther Strange (R). Strange lost the election to finish Sessions's term and was replaced January 3, 2018 by Doug Jones (D).
  9. ↑ Although Sanders was a candidate for the 2016 Democratic presidential nomination, and votes with the Democrats for organizational purposes, he has been elected and classified as an Independent throughout his time in Congress.
  10. 1 2 In Minnesota, Al Franken (D) resigned January 2, 2018. He was replaced January 3, 2018 by Tina Smith (D).
  11. ↑ Kyl previously served as a U.S. senator.
  12. ↑ In Arizona, Jon Kyl (R) resigned December 31, 2018.
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