1958 Arizona Senate election

The 1958 Arizona Senate election was held on November 4, 1958. Voters elected all 28 members of the Arizona Senate to serve two-year terms. At the time, each of Arizona's 14 counties elected two state senators for a total of 28 members of the Arizona Senate. Primary elections were held on September 9, 1958.

Prior to the elections, the Democrats held a supermajority of 26 seats over the Republicans' 2 seats.

Following the election, Democrats maintained control of the chamber and increased their supermajority by one seat to 27 Democrats to 1 Republican. The newly elected senators served in the 24th Arizona State Legislature, which met for two regular sessions at the State Capitol in Phoenix. The first opened on January 12, 1959, and adjourned on March 31; while the second convened on January 11, 1960, and adjourned on March 26.