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 November 1. The state's current U.S. senators are Democrats Kyrsten Sinema, serving since 2019, and Mark Kelly, serving since 2020.
Class 1 Class 1 U.S. senators belong to the electoral cycle who were elected for three Congresses in the state's first election of 1912. The seat in recent years has been contested in 2006, 2012 and 2018. The next election will be held in 2024. | C | Class 3 Class 3 U.S. senators belong to the electoral cycle who were elected for two Congresses in the state's first election of 1912. The seat in recent years has been contested in 2004, 2010 and 2016. The next election was a special election in 2020 to fill the remaining two years in John McCain's unfinished term, followed by a regular election in 2022. | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| # | Senator | Party | Dates in office | Electoral history | T | T | Electoral history | Dates in office | Party | Senator | # | |
| 1 |  Henry F. Ashurst | Democratic | March 27, 1912 – January 3, 1941 | Elected in 1912. | 1 | 62nd | 1 | Elected in 1912. | March 27, 1912 – March 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. | March 4, 1921 – March 3, 1927 | Republican |  Ralph H. Cameron | 2 | ||||||
| Re-elected in 1922. | 3 | 68th | ||||||||||
| 69th | ||||||||||||
| 70th | 4 | First elected in 1926. | March 4, 1927 – January 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 | January 3, 1941 – January 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 | January 3, 1953 – January 3, 1965 | First 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 | January 3, 1965 – January 3, 1977 | First elected in 1964. | 10 | 89th | ||||||
| 90th | ||||||||||||
| 91st | 11 | Elected again in 1968. | January 3, 1969 – January 3, 1987 | Republican | Barry Goldwater | 4 | ||||||
| Re-elected in 1970. Retired. | 11 | 92nd | ||||||||||
| 93rd | ||||||||||||
| 94th | 12 | Re-elected in 1974. | ||||||||||
| 5 |  Dennis DeConcini | Democratic | January 3, 1977 – January 3, 1995 | First 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. | January 3, 1987 – August 25, 2018 | Republican |  John McCain | 5 | ||||||
| Re-elected in 1988. Retired. | 14 | 101st | ||||||||||
| 102nd | ||||||||||||
| 103rd | 15 | Re-elected in 1992. | ||||||||||
| 6 |  Jon Kyl | Republican | January 3, 1995 – January 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 | January 3, 2013 – January 3, 2019 | Elected in 2012. Retired. | 18 | 113th | ||||||
| 114th | ||||||||||||
| 115th | 19 | Re-elected in 2016. Died in office. | ||||||||||
| August 25, 2018 – September 4, 2018 | Vacant | |||||||||||
| Appointed to continue McCain's term. Resigned. | September 4, 2018 – December 31, 2018 | Republican | Jon Kyl | 6 | ||||||||
| December 31, 2018 – January 3, 2019 | Vacant | |||||||||||
| 8 |  Kyrsten Sinema | Democratic | January 3, 2019 – Present | Elected in 2018. | 19 | 116th | Appointed to continue McCain's term. Lost election to finish McCain's term. | January 3, 2019 – December 2, 2020 | Republican |  Martha McSally | 7 | |
| Elected to finish McCain's term. | December 2, 2020 – Present | Democratic |  Mark Kelly | 8 | ||||||||
| 117th | ||||||||||||
| 118th | 20 | To be determined in the 2022 election. | ||||||||||
| To be determined in the 2024 election. | 20 | 119th | ||||||||||
| # | Senator | Party | Years in office | Electoral history | T | T | Electoral history | Years in office | Party | Senator | # | |
| Class 1 | Class 3 | |||||||||||
| Senator | First served | Last served | Length of service |
|---|---|---|---|
| Carl Hayden | March 4, 1927 | January 3, 1969 | 41 years, 9 months and 30 days (15,281 days) |
| John McCain | January 3, 1987 | August 25, 2018 | 31 years, 7 months and 22 days (11,557 days) |
| Barry Goldwater | January 3, 1953 | January 3, 1987 | 30 years (10,957 days) [lower-alpha 1] |
| Henry F. Ashurst | March 27, 1912 | January 3, 1941 | 28 years, 9 months and 7 days (10,509 days) |
| Jon Kyl | January 3, 1995 | December 31, 2018 | 18 years, 4 months and 1 day (6,693 days) [lower-alpha 2] |
Does not include incumbents
| Senator | First served | Last served | Length of service |
|---|---|---|---|
| Martha McSally | January 3, 2019 | December 2, 2020 | 1 year, 10 months, 4 weeks and 1 day (699 days) |
| Ralph H. Cameron | March 4, 1921 | March 3, 1927 | 5 years, 11 months, 3 weeks and 6 days (2,190 days) |
| Jeff Flake | January 3, 2013 | January 3, 2019 | 6 years (2,191 days) |
| Marcus A. Smith | March 27, 1912 | March 3, 1921 | 8 years, 11 months and 4 days (3,263 days) |
| Ernest McFarland | January 3, 1941 | January 3, 1953 | 12 years (4,383 days) |
| Paul Fannin | January 3, 1965 | January 3, 1977 |
| Senator | Date of birth | First served | Age |
|---|---|---|---|
| Henry F. Ashurst | September 13, 1874 | March 27, 1912 | 37 years, 6 months and 14 days |
| Dennis DeConcini | May 8, 1937 | January 3, 1977 | 39 years, 7 months and 26 days |
| Kyrsten Sinema | July 12, 1976 | January 3, 2019 | 42 years, 5 months and 22 days |
| Ernest McFarland | October 9, 1894 | January 3, 1941 | 46 years, 2 months and 25 days |
| Carl Hayden | October 2, 1877 | March 4, 1927 | 49 years, 5 months and 2 days |
| Senator | Date of birth | Last served | Age |
|---|---|---|---|
| Carl Hayden | October 2, 1877 | January 3, 1969 | 91 years, 3 months and 1 day |
| John McCain | August 29, 1936 | August 25, 2018 | 81 years, 11 months and 27 days |
| Barry Goldwater | January 2, 1909 | January 3, 1987 | 78 years and 1 day |
| Jon Kyl | April 25, 1942 | December 31, 2018 | 76 years, 8 months and 6 days |
| Marcus A. Smith | January 24, 1851 | March 4, 1921 | 70 years, 1 month and 8 days |
As of January 2021 [update] , there are four living former U.S. senators from Arizona. The most recent and most recently serving senator to die was John McCain (served 1987–2018), who died in office on August 25, 2018.
| Senator | Term of office | Date of birth (and age) |
|---|---|---|
| Dennis DeConcini | January 3, 1977 – January 3, 1995 | May 8, 1937 |
| Jon Kyl | January 3, 1995 – January 3, 2013 September 4, 2018 – December 31, 2018 | April 25, 1942 |
| Jeff Flake | January 3, 2013 – January 3, 2019 | December 31, 1962 |
| Martha McSally | January 3, 2019 – December 2, 2020 | March 22, 1966 |
These are tables of congressional delegations from Arizona to the United States House of Representatives and the United States Senate.
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| Class 1 |  | |
|---|---|---|
| Class 3 | ||
