The Allentown School District is a large, urban public school district located in Allentown, Pennsylvania in the Lehigh Valley region of eastern Pennsylvania. The district is the fourth largest school district in Pennsylvania as of the 2016-17 academic year. The school district includes two large urban public high schools, Allen High School and Dieruff High School, each based in Allentown, for grades nine through 12. As of the 2020-21 school year, 16,231 students attend its 21 schools, according to data released by the National Center for Education Statistics.