Summary:
ZIP code 93401 has one high school, San Luis Obispo High, serving grades 9–12 and enrolling 1,678 students. In 2025–2026, the school’s proficiency rates were above California’s in all three tested subjects, with the largest lead in English language arts (ELA). Its average proficiency advantage over the state across ELA, math, and science was 21 percentage points—the clearest overall finding for families comparing the school with statewide results.
Because it is the only school in the ZIP-code list, there is no local top or bottom school to compare; the useful comparisons are with the district and state. ELA proficiency was 76%, 26 points above the state and 8 points above the district. Science was 57%, 21 points above the state and 2 points above the district. Math was 54%, 15 points above the state, but 4 points below the district, making it the main exception to the school’s stronger-than-district results. Graduation was 97%, about 10 points above California and roughly level with the district; the dropout rate was 1%, 7 points below the state.
Results improved from 2024–2025 to 2025–2026, especially in ELA: the school gained 9 percentage points, while California gained less than 1 point, and the school’s advantage widened by 8 points. Math rose 3 points and science 3 points; science’s increase was about the same as the state’s. SchoolDigger lists the school at 210 of 2,137, in the 90th percentile with 5 stars, compared with 260 of 2,162, the 88th percentile and 4 stars the year before. The school reported a student–teacher ratio of 21.5 and 39% free/reduced lunch eligible in 2024–2025; these are context, not explanations for results. Because the list has just one school, it cannot show how schools within the ZIP code compare.
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