Summary:
Zip code 78588, located in the rural community of San Isidro, Texas, is home to a single high school, San Isidro High School, which serves grades 9 through 12 with a total enrollment of just 62 students as part of the San Isidro Independent School District (Isd).
San Isidro High School stands out for its perfect graduation and dropout rates, achieving a 100% graduation rate and a 0% dropout rate for the 2023-2024 school year. The school also excels in English II Reading, where 100% of students were proficient in the most recent testing year, far exceeding the state average of 59.88%. However, performance varies significantly by subject, with Algebra I proficiency at just 14.29% compared to the state average of 54.03%. The school serves a student body where 100% are eligible for free or reduced lunch, and it maintains a very low student-teacher ratio of 8.7 to 1, with spending per student at $16,180.
Key metrics show the school's state ranking has fluctuated over three years, from the 55th percentile in 2023-2024 to the 83rd percentile in 2024-2025, and back to the 62nd percentile in 2025-2026, likely due to the small student population where a single cohort's performance can dramatically shift results. While the school struggles in math, its consistent strength in English suggests the small class sizes may benefit reading and writing instruction. Overall, San Isidro High School demonstrates a strong commitment to student retention and graduation, even as academic proficiency in some subjects lags behind state averages.
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