The 1964 United States presidential election in Ohio was held on November 3, 1964 as part of the 1964 United States presidential election. Voters chose 26 representatives, or electors, to the Electoral College, who voted for President and Vice President.

Clinton County is a county located in the U.S. state of Ohio. As of the 2020 census, the population was 42,018. Its county seat and largest city is Wilmington. The county is named for former U.S. Vice President George Clinton. Clinton County comprises the Wilmington, Ohio Micropolitan Statistical Area, which is also included in the Cincinnati-Wilmington-Maysville, OH-KY-IN Combined Statistical Area.