Arizona's 18th legislative district

Arizona's 18th legislative district is one of 30 in the state, consisting of a section of Pima County. As of 2023, there are 65 precincts in the district, all in Pima, with a total registered voter population of 162,116. The district has an overall population of 243,411.

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 outside of competitive range and considered leaning Democratic.

Political representation
The district is represented in the 56th Arizona State Legislature, which convenes from January 1, 2023 to December 31, 2024, by Priya Sundareshan (D-Tucson) in the Arizona Senate and by Christopher Mathis (D-Tucson) and Nancy Gutierrez (D-Tucson) in the Arizona House of Representatives.

Election results
The 2022 elections were the first in the newly-drawn district.