William Allen High School is one of two large, urban public high schools of the Allentown School District in Allentown, Pennsylvania. The school provides public education for grades 9 through 12. William Allen High School is located at 106 North 17th Street, Allentown. It serves students from the center city and west side sections of Allentown. The city's other public high school, Dieruff High School, serves students from Allentown's eastern and southern sections. Until Dieruff's opening in 1959, William Allen High School was known as Allentown High School.