The 1936 Iowa State Senate elections took place as part of the biennial 1936 United States elections.

A statewide map of the 50 state Senate districts in the 1936 elections is provided by the Iowa General Assembly here.

The primary election on June 1, 1936, determined which candidates appeared on the November 3, 1936 general election ballot.

[a] To claim control of the chamber from Democrats, the Republicans needed to net 2 Senate seats.

Republicans gained control of the Iowa State Senate following the 1936 general election with the balance of power shifting to Republicans holding 28 seats and Democrats having 22 seats (a net gain of 4 seats for Republicans).