Home - John Horn High School in Mesquite ISD is committed to academic excellence and preparing students for future success. Explore our diverse programs, dedicated teachers, and supportive environment that empowers students to achieve their full potential

Dr. John Horn High School opened in 2000. Our 50-acre campus serves approximately 3,200 students in 9th - 12th grades. We serve the southern portion of Mesquite and the Mesquite ISD portion of Seagoville.

MISD Calendar - John Horn High School in Mesquite ISD is committed to academic excellence and preparing students for future success. Explore our diverse programs, dedicated teachers, and supportive environment that empowers students to achieve their full

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Elevate the Learning Experience for Everyone Everywhere. Mesquite ISD librarians deliver excellence in education for the entire school community, advancing the ability to make informed decisions and think critically.

Enrollment - John Horn High School in Mesquite ISD is committed to academic excellence and preparing students for future success. Explore our diverse programs, dedicated teachers, and supportive environment that empowers students to achieve their full pot

Counseling - John Horn High School in Mesquite ISD is committed to academic excellence and preparing students for future success. Explore our diverse programs, dedicated teachers, and supportive environment that empowers students to achieve their full pot

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