Arizona 1st Congressional District 2025 Dates. On the republican side, incumbent. Nine candidates—six democrats and three republicans—ran for the 1st congressional district, the most candidates who ran for a seat in arizona in 2025.
A democratic party primary took place on july 30, 2025, in arizona’s 1st congressional district to determine which democratic candidate would run in the district’s. Voters in arizona will cast ballots in the state’s nine congressional districts.