Duncanville, the eighth largest high school in Texas with 4,451 students, a 13-0 record and a No. The roadblock in the states's largest school classification is Allen High School. Allen, with 6,664 students in grades nine thru 12, is Texas’ largest high school. According to Texas’ University Interscholastic League, which overseas high school extra curriculars, Allen has 1,000 more students than the state’s second largest school. As you probably have heard Texas high school football is big time.

Source: Forbes December 15, 2018 14:48 UTC