1964 United States presidential election in Iowa

The 1964 United States presidential election in Iowa took place on November 3, 1964, as part of the 1964 United States presidential election. Iowa voters chose nine representatives, or electors, to the Electoral College, who voted for president and vice president.

Iowa was won by incumbent President Lyndon B. Johnson (D–Texas), with 61.88% of the popular vote, against Senator Barry Goldwater (R–Arizona), with 37.92% of the popular vote. , this is the last election in which Pottawattamie County, Plymouth County, Mahaska County, Mills County, Harrison County, Grundy County, Shelby County, Montgomery County, Fremont County, Ida County, and Osceola County voted for a Democratic presidential candidate. This was the first time since 1948 that the state would back a Democrat in a presidential election, and the last such occasion until 1988.

As of 2020, this remains the strongest performance by a Democrat in Iowa.