Largest High Schools in Texas, by Enrollment, in 2017

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You might be surprised to learn that the largest high school in Texas (according to enrollment) is Allen High School, of the Allen Independent School District, in northeast Texas. Topping the list of highest enrollment for the second year in a row, the school has grown from 6,380 in 2016 to 6,664 in enrollment in 2017.

According to data provided by University Interscholastic League (UIL), the largest high schools in Texas were tabulated by the size of their student bodies and included schools from both Klein and Plano Independent School Districts, both having three schools which were listed in the top 25. Taking the second, third, and fourth spots respectively were Plano West High School, Plano East High School, and Plano High School. As well, each of the Klein Independent School District schools that were listed had over 5,100 in student enrollment.

Founded in 1910 by the University of Texas at Austin, the purpose of the UIL is to “provide educational extracurricular academic, athletic, and music contests” throughout the state. Since its founding, the University Interscholastic League has grown into the largest (hey, it’s Texas…are you surprised?!) inter-school group of its kind throughout the globe, and continues to operate under the umbrella of the University of Texas. If you’re interested in learning more about high school sizes in Texas by enrollment, or to see how your high school stacks up, visit the UIL website for more information.