Trafford is a borough in Allegheny and Westmoreland counties in the U.S. state of Pennsylvania. Located near Pittsburgh in western Pennsylvania, the borough lies primarily in Westmoreland County; only a small portion extends into Allegheny County. It was incorporated in 1904 from the northernmost corner of North Huntingdon Township, and was named by George Westinghouse for Trafford near Manchester, England. Westinghouse purchased the land in 1902, and the Trafford Foundry began operations on October 3, 1903. The population was 3,317 at the 2020 census. Of this, 3,113 were in Westmoreland County, and only 61 were in Allegheny County.

Penn Township is a township in Westmoreland County, Pennsylvania, United States.