Penn-Trafford High School is a public high school located in Harrison City, Pennsylvania in Westmoreland County, and is the secondary school serving the Penn-Trafford School District. It is the result of several mergers of smaller school districts and entities. It is the successor of Penn Joint High School and Trafford High School. The school colors are green and gold. The different government entities that are incorporated into this school district are, in size order, Penn Township, Trafford Borough, Manor Borough (part), and Penn Borough.