Clintonville is a borough in Venango County, Pennsylvania, United States.

[4] According to the United States Census Bureau, the borough has a total area of 1.1 square miles (2.8 km2), all land.

As of the census[6] of 2000, there were 528 people, 215 households, and 147 families residing in the borough.

There were 242 housing units at an average density of 212.4 per square mile (82.0/km2).

27.4% of all households were made up of individuals, and 17.2% had someone living alone who was 65 years of age or older.