About This Place
Hillsboro is a city in and the county seat of Highland County, Ohio, United States. The population was 6,605 at the 2010 census.
Hillsboro is located at 39°12′21″N 83°36′50″W / 39.20583°N 83.61389°W / 39.20583; -83.61389 (39.205764, -83.613764).
According to the United States Census Bureau, the city has a total area of 5.2 square miles (13.4 km²), all land.