Youngsville is a borough in Warren County, Pennsylvania, United States.

[4] According to the United States Census Bureau, the borough has a total area of 1.3 square miles (3.4 km2), all land.

As of the census[8] of 2020, there were 1,731 people, 656 households, and 533 families living in the borough.

There were 732 housing units at an average density of 617.9 per square mile (238.6/km2).

27.0% of all households were made up of individuals, and 13.7% had someone living alone who was 65 years of age or older.