Hillsboro is a city in and the county seat of Highland County, Ohio, United States,[5] approximately 35 miles (56 km) west of Chillicothe and 50 miles (80 km) east of Cincinnati.

Hillsboro was platted in 1807, and most likely named for the hills near the original town site.

[6] One of the late 19th century's largest reform organizations, the Woman's Christian Temperance Union that went on to play important roles in achieving women's suffrage and prohibition, was founded in Hillsboro in 1873.

According to the United States Census Bureau, the city has a total area of 5.43 square miles (14.06 km2), all land.

35.8% of all households were made up of individuals, and 18.2% had someone living alone who was 65 years of age or older.

Hillsboro has produced steel alloy bells, which were shipped around the world.

[18] Since 1976 the city hosts the "Festival of the Bells" during the fourth of July weekend.

[22] The Central Campus of Southern State Community College is located within the city.