Robert R. Rigler Republican Andrew G. Frommelt Democratic The 1964 Iowa State Senate elections took place as part of the biennial 1964 United States elections.

At that time, the Iowa Senate still had several multi-member districts.

The Iowa Senate was expanded from 50 to 59 members and new district maps were drawn for the 1964 election.

The Iowa General Assembly provides statewide maps of each district.

To claim control of the chamber from Republicans, the Democrats needed to net 18 Senate seats.