Karn City Area School District is a public school district in Butler County, Clarion County, and Armstrong County, Pennsylvania. The district serves the boroughs of Chicora, Fairview, Karns City, Petrolia, and Bruin, and the townships of Parker, Fairview, and Donegal in Butler County, the townships of Perry, Sugarcreek, and Bradys Bend in Armstrong County, and the borough of East Brady and Brady T... Wikipedia