Clarence L. Carpenter[1] Democratic Clarence L. Carpenter[2] Democratic The 1964 Arizona Senate election was held on November 3, 1964.

Voters elected all 28 members of the Arizona Senate to serve two-year terms.

[4] The newly elected senators served in the 27th Arizona State Legislature, which met for two regular sessions at the State Capitol in Phoenix.

The first Special Session convened April 21, 1965, and adjourned sine die on May 10;[5]: 311  the second convened on May 11, 1965, and adjourned sine die on June 15;[5]: 337  the Third Special session convened on June 16, 1965, and adjourned sine die on July 1;[5]: 375  with the final Special Session, the fourth, convened September 13, 1965, and adjourned sine die on October 9.

[6]: 351 The Democrats had a net gain of 2 seats in the Arizona Senate following the election.