The Penn-Trafford School District is a public school district that serves western Westmoreland County, Pennsylvania and a small portion of Allegheny County, Pennsylvania.

The district is governed by a locally elected, nine member school board who serve, staggered four-year terms, the Pennsylvania General Assembly and the Pennsylvania Department of Education.

The district neighbors 7 other school districts: Franklin Regional, Greensburg-Salem, Hempfield Area, Jeannette City, Norwin, Gateway, and East Allegheny.

In 1956 Trafford Borough became a third party to form a district administrative unit under the County Plan for the Reorganization of School Districts, however all three areas retained their own identity in the joint school system.

In the meantime plans for a full merger of Penn Joint and Trafford were initiated in 1961 and were finalized in 1965 when the Commonwealth of Pennsylvania approved the Penn-Trafford School District as Administrative Unit XV of the Westmoreland County Plan.