Arizona's 4th legislative district is one of 30 in the state, consisting of a section of Maricopa County.

As of 2023, there are 70 precincts in the district, all in Maricopa, with a total registered voter population of 168,929.

[2] Following the 2020 United States redistricting cycle, the Arizona Independent Redistricting Commission (AIRC) redrew legislative district boundaries in Arizona.

According to the AIRC, the district is highly competitive politically.

[3] The district is represented in the 56th Arizona State Legislature, which convenes from January 1, 2023 to December 31, 2024, by Christine Marsh (D-Phoenix) in the Arizona Senate and by Matt Gress (R-Phoenix) and Eric Meyer (D-Paradise Valley) in the Arizona House of Representatives.