San Antonio ISD School District

San Antonio ISD serves 44,670 students across 98 schools in San Antonio, Texas. With 94 of those schools carrying a published ranking, parents have broad data to work with when comparing options. The district's average school score sits at 5.2 out of 10 — a useful baseline as you evaluate individual campuses against that midpoint.

The clearest standout is CAST Med High School, rated 8.8 out of 10 — the district's top performer and well above the district average. It is followed by Jefferson High School at 8.3 and CAST Tech High School at 7.3, giving families of high schoolers three above-average options to consider. Both CAST campuses run career and technical themes, with CAST Med focused on health sciences and CAST Tech oriented toward technology and engineering pathways. That concentration of specialized high schools is a defining feature of what San Antonio ISD offers at the secondary level.

On the elementary side, Robert B. Green Elementary leads at 7.6 out of 10, with Herff Elementary close behind at 7.5. Both score meaningfully above the district's 5.2 average, which puts them in the upper tier of the district's elementary options. Parents zoned to those campuses — or willing to explore enrollment flexibility — are looking at schools that outperform the majority of the district's 98 schools.

For parents comparing districts in the San Antonio metro, the key numbers to hold onto are these: a 44,670-student enrollment, a district average of 5.2, and a top school score of 8.8. The spread between average and top performers is wide, which means school selection within the district matters significantly. Families should prioritize identifying which specific campus their address feeds into and compare that school's individual rating against both the district average and the top-rated schools listed here. San Antonio ISD's size means meaningful variation exists across campuses — the data supports looking closely rather than evaluating the district as a single unit.