• South Texas ISD

    • Schools, Colleges & Education
    100 Med High Drive
    Mercedes, TX 78570
    (956) 565-2454
    (956) 565-9129 (fax)
    Hours:
    M-Th: 8:00 a.m. to 5:00 p.m.
    F: 8:00 a.m. to 4:00 p.m.
    • About

      South Texas ISD is composed of four high schools and one junior high serving students throughout the Valley. STISD is an open-enrollment district with no tuition fees and free bus transportation.