Athletics
See also: Lehigh Valley ConferenceWilliam Allen is one of 12 high schools that compete in the Lehigh Valley Conference. The school plays its home football and some of its soccer games at J. Birney Crum Stadium. Most of its indoor athletics are played in the school's J. Milo Sewards Gymnasium. The school's primary athletic rivalry is with cross-town Dieruff High School.
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