The Mount Union Area School District is a public school district based in Mount Union, Pennsylvania. The district encompasses approximately 151 square miles. According to 2000 federal census data, it serves a resident population of 9,678. The school district includes all of Mount Union borough, Mapleton borough, Shirley Township and Union Township in Huntingdon County. The school district also includes Kistler borough, Newton Hamilton borough, and Wayne Township, all located in Mifflin County.