Arizona was admitted to the Union on February 14, 1912. U.S. senators from Arizona belong to class 1 and class 3 and are popularly elected for a six-year term beginning January 3. Elections are held the first Tuesday after the first Monday in November. The state's current U.S. senators are Independent Kyrsten Sinema, serving since 2019, and Democrat Mark Kelly, serving since 2020. Carl Hayden was the longest serving senator, served from 1927 to 1969. Arizona is one of fifteen states alongside Colorado, Florida, Georgia, Hawaii, Idaho, Indiana, Louisiana, Maine, Massachusetts, Minnesota, Missouri, Nevada, South Dakota and Utah to have a younger senior senator and an older junior senator. In total, only 14 individuals have ever served as a Senator from Arizona.
Class 1 Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2006, 2012, 2018, and 2024. The next election will be in 2030. | C | Class 3 Class 3 U.S. senators belong to the electoral cycle that has recently been contested in 2010, 2016, 2020 (special election), and 2022. The next election will be in 2028. | ||||||||||
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# | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
Vacant | Feb 14, 1912 – Mar 27, 1912 | Arizona became a state February 14, 1912, but did not elect its U.S. senators until March 27. | 1 | 62nd | 1 | Arizona became a state February 14, 1912, but did not elect its U.S. senators until March 27. | Feb 14, 1912 – Mar 27, 1912 | Vacant | ||||
1 | Henry F. Ashurst | Democratic | Mar 27, 1912 – Jan 3, 1941 | Elected in 1912. | Elected in 1912. | Mar 27, 1912 – Mar 3, 1921 | Democratic | Marcus A. Smith | 1 | |||
63rd | ||||||||||||
64th | 2 | Re-elected in 1914.Lost re-election. | ||||||||||
Re-elected in 1916. | 2 | 65th | ||||||||||
66th | ||||||||||||
67th | 3 | Elected in 1920.Lost re-election. | Mar 4, 1921 – Mar 3, 1927 | Republican | Ralph H. Cameron | 2 | ||||||
Re-elected in 1922. | 3 | 68th | ||||||||||
69th | ||||||||||||
70th | 4 | Elected in 1926. | Mar 4, 1927 – Jan 3, 1969 | Democratic | Carl Hayden | 3 | ||||||
Re-elected in 1928. | 4 | 71st | ||||||||||
72nd | ||||||||||||
73rd | 5 | Re-elected in 1932. | ||||||||||
Re-elected in 1934.Lost renomination. | 5 | 74th | ||||||||||
75th | ||||||||||||
76th | 6 | Re-elected in 1938. | ||||||||||
2 | Ernest McFarland | Democratic | Jan 3, 1941 – Jan 3, 1953 | Elected in 1940. | 6 | 77th | ||||||
78th | ||||||||||||
79th | 7 | Re-elected in 1944. | ||||||||||
Re-elected in 1946.Lost re-election. | 7 | 80th | ||||||||||
81st | ||||||||||||
82nd | 8 | Re-elected in 1950. | ||||||||||
3 | Barry Goldwater | Republican | Jan 3, 1953 – Jan 3, 1965 | Elected in 1952. | 8 | 83rd | ||||||
84th | ||||||||||||
85th | 9 | Re-elected in 1956. | ||||||||||
Re-elected in 1958.Retired to run for U.S. President. | 9 | 86th | ||||||||||
87th | ||||||||||||
88th | 10 | Re-elected in 1962.Retired. | ||||||||||
4 | Paul Fannin | Republican | Jan 3, 1965 – Jan 3, 1977 | Elected in 1964. | 10 | 89th | ||||||
90th | ||||||||||||
91st | 11 | Elected in 1968. | Jan 3, 1969 – Jan 3, 1987 | Republican | Barry Goldwater | 4 | ||||||
Re-elected in 1970.Retired. | 11 | 92nd | ||||||||||
93rd | ||||||||||||
94th | 12 | Re-elected in 1974. | ||||||||||
5 | Dennis DeConcini | Democratic | Jan 3, 1977 – Jan 3, 1995 | Elected in 1976. | 12 | 95th | ||||||
96th | ||||||||||||
97th | 13 | Re-elected in 1980.Retired. | ||||||||||
Re-elected in 1982. | 13 | 98th | ||||||||||
99th | ||||||||||||
100th | 14 | Elected in 1986. | Jan 3, 1987 – Aug 25, 2018 | Republican | John McCain | 5 | ||||||
Re-elected in 1988.Retired. | 14 | 101st | ||||||||||
102nd | ||||||||||||
103rd | 15 | Re-elected in 1992. | ||||||||||
6 | Jon Kyl | Republican | Jan 3, 1995 – Jan 3, 2013 | Elected in 1994. | 15 | 104th | ||||||
105th | ||||||||||||
106th | 16 | Re-elected in 1998. | ||||||||||
Re-elected in 2000. | 16 | 107th | ||||||||||
108th | ||||||||||||
109th | 17 | Re-elected in 2004. | ||||||||||
Re-elected in 2006.Retired. | 17 | 110th | ||||||||||
111th | ||||||||||||
112th | 18 | Re-elected in 2010. | ||||||||||
7 | Jeff Flake | Republican | Jan 3, 2013 – Jan 3, 2019 | Elected in 2012.Retired. | 18 | 113th | ||||||
114th | ||||||||||||
115th | 19 | Re-elected in 2016.Died. | ||||||||||
Aug 25, 2018 – Sep 4, 2018 | Vacant | |||||||||||
Appointed to continue McCain's term.Resigned. | Sep 4, 2018 – Dec 31, 2018 | Republican | Jon Kyl | 6 | ||||||||
Dec 31, 2018 – Jan 3, 2019 | Vacant | |||||||||||
8 | Kyrsten Sinema | Democratic | Jan 3, 2019 – present | Elected in 2018.Left the Democratic Party on December 9, 2022.Retiring at the end of term. | 19 | 116th | Appointed to continue McCain's term.Lost election to finish McCain's term. | Jan 3, 2019 – Dec 2, 2020 | Republican | Martha McSally | 7 | |
Elected in 2020 to finish McCain's term. | Dec 2, 2020 – present | Democratic | Mark Kelly | 8 | ||||||||
117th | ||||||||||||
Independent | ||||||||||||
118th | 20 | Re-elected in 2022. | ||||||||||
9 | Ruben Gallego | Democratic | Taking office Jan 3, 2025 | Elected in 2024. | 20 | 119th | ||||||
120th | ||||||||||||
121st | 21 | To be determined in the 2028 election. | ||||||||||
# | Senator | Party | Years in office | Electoral history | T | C | T | Electoral history | Years in office | Party | Senator | # |
Class 1 | Class 3 |
Since Arizona became a U.S. state in 1912, it has sent congressional delegations to the United States Senate and United States House of Representatives, beginning with the 63rd United States Congress in 1913. Before becoming a state, the Arizona Territory elected a non-voting delegate at-large to Congress from 1864 to 1912. Each state elects two senators to serve for six years, and varying numbers of members of the House, depending on state population, to two-year terms. Arizona has sent nine members to the House in each delegation since the 2010 United States Census.
The 1912–13 United States Senate elections were held on various dates in various states. They were the last U.S. Senate elections before the ratification of the Seventeenth Amendment in 1913, establishing direct elections for all Senate seats. Senators had been primarily chosen by state legislatures. Senators were elected over a wide range of time throughout 1912 and 1913, and a seat may have been filled months late or remained vacant due to legislative deadlock. Some states elected their senators directly even before passage of Seventeenth Amendment. Oregon pioneered direct election and experimented with different measures over several years until it succeeded in 1907. Soon after, Nebraska followed suit and laid the foundation for other states to adopt measures reflecting the people's will. By 1912, as many as 29 states elected senators either as nominees of their party's primary or in conjunction with a general election.