Penn is a borough in Westmoreland County, Pennsylvania, United States.

The borough was named for Pennsylvania founder William Penn.

[4] According to the United States Census Bureau, the borough has a total area of 0.2 square miles (0.52 km2), all of it land.

At the time of the 2000 census there were 460 people, 182 households, and 133 families living in the borough.

[6] Of the 182 households 37.4% had children under the age of 18 living with them, 51.1% were married couples living together, 18.7% had a female householder with no husband present, and 26.4% were non-families.