Ohio re-elected incumbent Democratic-Republican Party President James Monroe by a large margin. Although Monroe ran unopposed, John Quincy Adams received a minority of the vote as an opposition candidate. This is the most recent time a party won every county in the state.
Results
1820 United States presidential election in Ohio[1]
^Ohio. Secretary of State. (1909). Ohio election statistics: the general election. Springfield, Ohio: The Springfield Publishing Company, State Printers. p. 3. OCLC 5470967. Retrieved April 20, 2019.