Mount Healthy is a city in Hamilton County, Ohio, United States, in the Cincinnati/Northern Kentucky metropolitan area. The population was 6,098 at the 2010 census.^[7] Hamilton is a city in and the county seat of Butler County, Ohio. Located 20 miles north of Cincinnati, Hamilton is the second largest city in the Greater Cincinnati area and the 10th largest city in Ohio. The population was 63,399 at the 2020 census