Arizona is divided into nine congressional districts, each represented by a member of the United States House of Representatives. Since the 2008 elections, Democrats and Republicans have alternated holding a majority of seats in the delegation in six of the last eight elections.
List of members of the United States House delegation from Arizona, district boundaries, and the district political ratings according to the CPVI. The delegation has a total of nine members, with six Republicans and three Democrats.
| District | Member (Residence) [2] | Party | Incumbent since | CPVI (2022) [3] | District map |
|---|---|---|---|---|---|
| 1st |  David Schweikert (Fountain Hills) | Republican | January 3, 2011 [4] | R+2 |  |
| 2nd |  Eli Crane (Oro Valley) | Republican | January 3, 2023 [5] | R+6 |  |
| 3rd |  Ruben Gallego (Phoenix) | Democratic | January 6, 2015 [6] | D+24 |  |
| 4th |  Greg Stanton (Phoenix) | Democratic | January 3, 2019 [7] | D+2 |  |
| 5th |  Andy Biggs (Gilbert) | Republican | January 3, 2017 [8] | R+11 |  |
| 6th |  Juan Ciscomani (Tucson) | Republican | January 3, 2023 [9] | R+3 |  |
| 7th |  Raúl Grijalva (Tucson) | Democratic | January 3, 2003 [10] | D+15 |  |
| 8th |  Debbie Lesko (Peoria) | Republican | May 7, 2018 [11] | R+10 |  |
| 9th |  Paul Gosar (Bullhead City) | Republican | January 3, 2011 [12] | R+16 |  |
From 1863 to 1912, Arizona Territory sent one non-voting delegate to the House of Representatives. After its statehood in 1912, Arizona was granted one representative in the House. As the state's population has grown, Arizona's delegation has increased in size to its total of nine representatives.
| Congress | Representatives | Notes |
|---|---|---|
| 38th–62nd (1863–1912) | 1 | Non-voting delegate |
| 62nd–77th (1912–1943) | 1 | |
| 78th–80th (1943–1949) | 2 | Elected on an at-large basis |
| 81st–87th (1949–1963) | 2 | |
| 88th–92nd (1963–1973) | 3 | |
| 93rd–97th (1973–1983) | 4 | |
| 98th–102nd (1983–1993) | 5 | |
| 103rd–107th (1993–2003) | 6 | |
| 108th–112th (2003–2013) | 8 | |
| 113th– (2013–) | 9 |
Table of United States congressional district boundary maps in the State of Arizona, presented chronologically. [13] All redistricting events that took place in Arizona between 1973 and 2013 are shown.
| Year | Statewide map | Phoenix highlight |
|---|---|---|
| 1973–1982 |  |  |
| 1983–1992 |  |  |
| 1993–2002 |  |  |
| 2003–2013 |  |  |
| 2013-2023 |  |  |
Due to redistricting, the congressional district numbers in Arizona have changed for the 2022 election cycle. Through this process, the district numbers have changed the following ways:
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.
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Massachusetts's 5th congressional district is a congressional district in eastern Massachusetts. The district is represented by Katherine Clark of the Democratic Party. Massachusetts's congressional redistricting after the 2010 census changed the borders of the district starting with the elections of 2012, with the new 3rd district largely taking the place of the old 5th. The 5th district covers many of the communities represented in the old 7th district.
Massachusetts's 8th congressional district is located in eastern Massachusetts, including part of Boston. It is represented by Democrat Stephen Lynch. For one congressional term (1791–1793), it served as the home district of the District of Maine. The district boundaries were significantly changed, as of the elections of 2012, due to redistricting after the 2010 census, with the old 8th district largely being shifted to the new 7th district. The new 8th district comprises many of the communities of the old 9th district, as well as some easternmost Norfolk County communities and northernmost Plymouth County communities of the old 10th district.
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Arizona's 4th congressional district is a congressional district located in the U.S. state of Arizona. It is represented by Democrat Greg Stanton as of the 2022 election. The district is located entirely within Maricopa County.
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Rubén Marinelarena Gallego is an American politician and former U.S. Marine serving as the U.S. representative for Arizona's 3rd congressional district. Gallego served and deployed as a USMCR Corporal in the US invasion of Iraq.
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The 2024 United States House of Representatives elections will be held on November 5, 2024, as part of the 2024 United States elections, to elect representatives from all 435 congressional districts across each of the 50 U.S. states, as well as 6 non-voting delegates from the District of Columbia and the inhabited U.S. territories to the United States House of Representatives. Special elections have also been held on various dates in 2024. Numerous other federal, state, and local elections, including the U.S. presidential election and elections to the Senate, will also be held on this date. The winners of this election will serve in the 119th United States Congress, with seats apportioned among the states based on the 2020 United States census.