The 1974 Arizona Senate election was held on November 5, 1974. Voters elected members of the Arizona Senate in all 30 of the state's legislative districts to serve a two-year term. Primary elections were held on September 10, 1974.
Prior to the elections, the Republicans held a majority of 18 seats over the Democrats' 12 seats.
Following the election, Democrats flipped control of the chamber and took a majority of 18 Democrats to 12 Republicans.
The newly elected senators served in the 32nd Arizona State Legislature.