- COLONEL MIGUEL MENCHACA EARLY CHILDHOOD CENTER — Grades PK–K · 809 students
- JULIAN C GALLARDO EL — Grades 1–5 · 602 students
- HERITAGE EL — Grades 1–5 · 555 students
- FREEDOM EL — Grades 1–5 · 536 students
- W M PEARCE PRI — Grades 1–5 · 529 students
- JULIUS L MATTHEY MIDDLE — Grades 6–8 · 656 students
- LOSOYA MIDDLE — Grades 6–8 · 607 students
- SOUTHSIDE H S — Grades 9–12 · 1,772 students
- BEXAR CO J J A E P — Grades 9–12 · 3 students
- SOUTHSIDE ALTER CTR — Grades 6–12 · 22 students
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| Metric | Southside Independent School District | National Average | Comparison |
|---|---|---|---|
| Student Enrollment | 5,965 | 3,700 | ↑ Larger than avg |
| Number of Schools | 10 | 6 | Varies by district |
| Per-Pupil Spending | $10,900/yr (est.) | $13,700/yr | State avg est. |
| District Type | Public School District | Public District | — |
| Overall Rating | 5/10 — Average | — | Near average |
| District | Rating | Percentile | Students |
|---|---|---|---|
| Southside Independent School District (this district) | 5/10 | 42nd | 5,965 |
| San Antonio Independent School District | 2/10 | 10th | 45,255 |
| East Central Independent School District | 2/10 | 13th | 10,617 |
🔢 Show the math behind this rating
Ranked against 1156 rated districts in TX → 42nd percentile → 5/10.
Source: Texas Education Agency STAAR, grades 3–8 Reading & Math (Meets Grade Level), 2023. Full methodology →
About Southside Independent School District
Zip code 78221 in Southside, Texas is served by Southside Independent School District for public school enrollment. The district covers grades Pre-K – 12th. This page provides a data-driven overview of Southside Independent School District’s funding levels, size, rating, and what families should know before enrolling or making a housing decision in this area.
Understanding the 5/10 Rating
With a rating of 5/10 (average), Southside Independent School District ranks among Texas’s average-rated school systems. Our ratings are based on state assessment results — the share of students scoring proficient or above in reading and math, as reported in Texas’ STAAR grades 3–8 Reading & Math assessments (2023 school year). We average each district’s reading and math proficiency, then rank it against other districts in the same state to produce a 1–10 score. Because Texas is compared only against itself, the rating reflects how this district performs relative to its in-state peers.
Southside Independent School District falls near the middle of Texas on state assessment results, with reading and math proficiency close to the state median. Average-rated districts provide foundational public education, and many families find they deliver solid day-to-day learning — particularly when parents stay engaged. If you're considering this area, look beyond the overall rating: visit schools, talk to current parents, and research the specific school your child would attend. Average districts often have individual schools that significantly outperform the district mean.
Enrollment for Families in Zip Code 78221
Children in zip code 78221 are assigned to Southside Independent School District for public school enrollment, covering grades Pre-K – 12th. School assignments are address-specific — your elementary, middle, and high school placements depend on your exact street address within zip code 78221, not just your neighborhood. Two homes on opposite ends of the same zip code may be assigned to different schools within the same district.
To confirm your specific school assignments, contact Southside Independent School District at (210)882-1600. Typical enrollment documents include proof of address, a government-issued birth certificate, immunization records, and any existing school records or IEP documentation. If your child has an IEP or 504 plan, bring that documentation to enrollment — Texas districts are required to continue services within a reasonable period. Fall enrollment windows typically open in late winter or early spring; contact the district for exact dates and required steps.
School Districts and Home Values in San Antonio
For families considering a purchase in the Southside area, district assignment matters financially. Because Southside Independent School District serves zip code 78221, buyers should factor school district quality into their overall evaluation of homes in zip code 78221. District boundaries are address-specific — verify the exact district assignment for any property you’re seriously considering rather than assuming based on the neighborhood. A single block can place two adjacent homes in different districts with different ratings and different annual property tax implications.
Use the property tax estimator on this page to calculate estimated annual tax obligations based on your target purchase price. In Texas, property taxes are a primary funding source for public schools — your tax payments directly support Southside Independent School District programs and staff. Understanding both district quality and the associated tax burden is essential financial due diligence before committing to any home in zip code 78221.
Data Sources and Accuracy
All district information on this page is sourced from the NCES Common Core of Data (CCD) 2024–2025, the U.S. Department of Education’s annual census of all public school districts — the same dataset used by researchers, journalists, and policymakers to analyze American public education. District boundaries, school assignments, phone numbers, and per-pupil expenditure figures are updated annually when NCES publishes new data, typically in spring. Always verify your specific school assignment and enrollment requirements directly with Southside Independent School District before making any housing or enrollment decision based on zip code 78221 data.