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.
2025 districts and representatives
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.
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.
Table of United States congressional district boundary maps in the State of Arizona, presented chronologically.[11] All redistricting events that took place in Arizona between 1973 and 2013 are shown.
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:
Arizona's 1st congressional district became Arizona's 2nd congressional district
Arizona's 2nd congressional district became Arizona's 6th congressional district
Arizona's 3rd congressional district became Arizona's 7th congressional district
Arizona's 4th congressional district became Arizona's 9th congressional district
Arizona's 5th congressional district remained Arizona's 5th congressional district
Arizona's 6th congressional district became Arizona's 1st congressional district
Arizona's 7th congressional district became Arizona's 3rd congressional district
Arizona's 8th congressional district remained Arizona's 8th congressional district
Arizona's 9th congressional district became Arizona's 4th congressional district