Cherry Valley is a borough in Butler County, Pennsylvania, United States.

According to the United States Census Bureau, the borough has a total area of 2.8 square miles (7.3 km2), all land.

There were 31 housing units at an average density of 10.8 per square mile (4.2/km2).

22.2% of all households were made up of individuals, and 11.1% had someone living alone who was 65 years of age or older.

There were 25.0% of families and 18.8% of the population living below the poverty line, including 37.5% of under eighteens and none of those over 64.