SOUTH TEXAS ISD

Headquartered at 7001 East Expressway 83 in Mercedes, Texas, South Texas ISD is an active, traditional public school district dedicated to delivering rigorous secondary education across the McAllen-Edinburg-Mission metropolitan region. Operating seven specialized campuses situated in a rural fringe community setting, the district serves students in sixth through twelfth grade. Unlike charter organizations, South Texas ISD functions as a standard public school district, offering open-enrollment opportunities designed to prepare middle and high school learners for higher education and career success. Families and education researchers seeking further detail can access district resources through their official website at www.stisd.net or by phone at (956) 565-2454.

In the 2024–2025 school year, the district educates a vibrant student body of 4,639 pupils, with enrollment spanning 2,533 female and 2,106 male students. The community reflects a rich demographic tapestry, prominently featuring over 4,000 Hispanic students alongside Asian, White, Black, and multiracial student populations. South Texas ISD supports its scholars through an exceptionally strong staffing structure, employing roughly 1,455 total full-time equivalent staff members. This includes nearly 659 dedicated classroom teachers, 40 instructional aides, and over 750 support staff professionals. This substantial investment in educator talent ensures a highly favorable student-to-teacher ratio, allowing for tailored instructional support and comprehensive student services across every grade level served.