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

[4] Polk State Center, a state-run facility for the intellectually disabled, was opened in 1897 and is located in the borough.

[5] Families and residents sued Pennsylvania in an attempt to prevent the closure.

There were 209 housing units at an average density of 107.6 per square mile (41.5/km2).

33.2% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older.