Part of the library system of Butler County, the Zelienople Area Public Library serves the communities of Zelienople, Harmony, Lancaster Township and Jackson Township. It participates in the ACCESS PA statewide library system.
The library has more than 60,000 items in its collection, including books, videos, audios, CDs, magazines and even puppets. Computers for surfing the Web, word processing and printing also are available. The children's libary is located on the lower level of the building.
The libary is associated with the Friends of the Zelienople Area Public Library, a group started in 2004 that plans events to benefit the library.