Class 1Class 1 U.S. senators belong to the electoral cycle that has recently been contested in 2000, 2006, 2012, and 2018.
The next election will be in 2024.
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C
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Class 3Class 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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| #
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Senator
|
Party
|
Dates in office
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Electoral history
|
T
|
T
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Electoral history
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Dates in office
|
Party
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Senator
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#
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| Vacant
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Feb 14, 1912 –
Mar 27, 1912
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Arizona became a state February 14, 1912,
but did not elect its U.S. senators until March 27.
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1
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62nd
|
1
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Arizona became a state February 14, 1912,
but did not elect its U.S. senators until March 27.
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Feb 14, 1912 –
Mar 27, 1912
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Vacant
|
| 1
|
File:Henry Fountain Ashurst.jpg
Henry F. Ashurst
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Democratic
|
Mar 27, 1912 –
Jan 3, 1941
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Elected in 1912.
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Elected in 1912.
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Mar 27, 1912 –
Mar 3, 1921
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Democratic
|
File:Marcus Aurelius Smith.jpg
Marcus A. Smith
|
1
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| 63rd
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| 64th
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2
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Re-elected in 1914.Lost re-election.
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| Re-elected in 1916.
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2
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65th
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| 66th
|
| 67th
|
3
|
Elected in 1920.Lost re-election.
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Mar 4, 1921 –
Mar 3, 1927
|
Republican
|
File:Senator Ralph Cameron.jpg
Ralph H. Cameron
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2
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| Re-elected in 1922.
|
3
|
68th
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| 69th
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| 70th
|
4
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Elected in 1926.
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Mar 4, 1927 –
Jan 3, 1969
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Democratic
|
File:Carl Hayden.jpg
Carl Hayden
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3
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| Re-elected in 1928.
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4
|
71st
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| 72nd
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| 73rd
|
5
|
Re-elected in 1932.
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| Re-elected in 1934.Lost renomination.
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5
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74th
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| 75th
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| 76th
|
6
|
Re-elected in 1938.
|
| 2
|
File:Mcfarland ernest.jpg
Ernest McFarland
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Democratic
|
Jan 3, 1941 –
Jan 3, 1953
|
Elected in 1940.
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6
|
77th
|
| 78th
|
| 79th
|
7
|
Re-elected in 1944.
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| Re-elected in 1946.Lost re-election.
|
7
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80th
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| 81st
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| 82nd
|
8
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Re-elected in 1950.
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| 3
|
File:Senator Goldwater 1960.jpg
Barry Goldwater
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Republican
|
Jan 3, 1953 –
Jan 3, 1965
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Elected in 1952.
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8
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83rd
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| 84th
|
| 85th
|
9
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Re-elected in 1956.
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| Re-elected in 1958.Retired to run for U.S. President.
|
9
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86th
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| 87th
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| 88th
|
10
|
Re-elected in 1962.Retired.
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| 4
|
File:Paul Fannin.jpg
Paul Fannin
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Republican
|
Jan 3, 1965 –
Jan 3, 1977
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Elected in 1964.
|
10
|
89th
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| 90th
|
| 91st
|
11
|
Elected in 1968.
|
Jan 3, 1969 –
Jan 3, 1987
|
Republican
|
File:BarryGoldwater.jpg
Barry Goldwater
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4
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| Re-elected in 1970.Retired.
|
11
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92nd
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| 93rd
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| 94th
|
12
|
Re-elected in 1974.
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| 5
|
File:Dennis DeConcini.jpg
Dennis DeConcini
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Democratic
|
Jan 3, 1977 –
Jan 3, 1995
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Elected in 1976.
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12
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95th
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| 96th
|
| 97th
|
13
|
Re-elected in 1980.Retired.
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| Re-elected in 1982.
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13
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98th
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| 99th
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| 100th
|
14
|
Elected in 1986.
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Jan 3, 1987 –
Aug 25, 2018
|
Republican
|
File:Senator John McCain official portrait 2006 (2).jpg
John McCain
|
5
|
| Re-elected in 1988.Retired.
|
14
|
101st
|
| 102nd
|
| 103rd
|
15
|
Re-elected in 1992.
|
| 6
|
File:Jon Kyl, official 109th Congress photo.jpg
Jon Kyl
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Republican
|
Jan 3, 1995 –
Jan 3, 2013
|
Elected in 1994.
|
15
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104th
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| 105th
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| 106th
|
16
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Re-elected in 1998.
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| Re-elected in 2000.
|
16
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107th
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| 108th
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| 109th
|
17
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Re-elected in 2004.
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| Re-elected in 2006.Retired.
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17
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110th
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| 111th
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| 112th
|
18
|
Re-elected in 2010.
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| 7
|
File:Jeff Flake, official portrait, 113th Congress.jpg
Jeff Flake
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Republican
|
Jan 3, 2013 –
Jan 3, 2019
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Elected in 2012.Retired.
|
18
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113th
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| 114th
|
| 115th
|
19
|
Re-elected in 2016.Died.
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|
|
Aug 25, 2018 –
Sep 4, 2018
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Vacant
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| Appointed to continue McCain's term.Resigned.
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Sep 4, 2018 –
Dec 31, 2018
|
Republican
|
File:Jon Kyl, official portrait, 115th Congress.jpg
Jon Kyl
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6
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|
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Dec 31, 2018 –
Jan 3, 2019
|
Vacant
|
| 8
|
File:Sinema Dec 2023.jpg
Kyrsten Sinema
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Democratic
|
Jan 3, 2019 –
present
|
Elected in 2018.Left the Democratic Party on December 9, 2022.Retiring at the end of term.
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19
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116th
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Appointed to continue McCain's term.Lost election to finish McCain's term.
|
Jan 3, 2019 –
Dec 2, 2020
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Republican
|
File:Sen. Martha McSally official Senate headshot 116th congress (cropped).jpg
Martha McSally
|
7
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| Elected in 2020 to finish McCain's term.
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Dec 2, 2020 –
present
|
Democratic
|
File:Mark Kelly, Official Portrait 117th (cropped).jpg
Mark Kelly
|
8
|
| 117th
|
| Independent
|
| 118th
|
20
|
Re-elected in 2022.
|
| 9
|
File:Ruben Gallego official portrait.jpg
Ruben Gallego
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Democratic
|
Taking office
Jan 3, 2025
|
Elected in 2024.
|
20
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119th
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| 120th
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| 121st
|
21
|
To be determined in the 2028 election.
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| #
|
Senator
|
Party
|
Years in office
|
Electoral history
|
T
|
C
|
T
|
Electoral history
|
Years in office
|
Party
|
Senator
|
#
|
| Class 1
|
Class 3
|
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