Summary:
Zip code 93402 has one listed middle school, Los Osos Middle, serving grades 6–8 and enrolling 494 students. In 2025–2026, its proficiency was above California’s in ELA, math, and science, but below the San Luis Coastal Unified district in all three. The clearest overall finding is that the school performs better than the state benchmark, while the district comparison—especially in math—shows room to improve.
There is no school-to-school top or bottom because Los Osos Middle is the only school in this group. Against the state, its strongest result was ELA: 67% proficient, 17 percentage points above the state; math was its weakest relative result at 49%, still 10 points above the state. The school trailed the district by 1 point in ELA, 9 in math, and 3 in science. Results also vary by grade: seventh-grade ELA was a standout at 77%, 6 points above the district, while sixth-grade ELA was 58%, 11 points below it. Math proficiency was below the district in every grade. Chronic absenteeism is another concern: 22% at Los Osos, compared with 16% districtwide and 18% statewide.
Recent results are mixed: from 2024–2025 to 2025–2026, Los Osos’s ELA proficiency dipped by 1 percentage point and math by 4, while science rose by 1; state proficiency increased in all three subjects, so Los Osos’s lead over the state narrowed across the board. SchoolDigger gave the school 4 stars and ranked it 470th of 2,703 schools, in the 83rd percentile, down from the 86th percentile the prior year. The 2024–2025 student–teacher ratio was 18.5. Also in 2024–2025, 51% of students were reported as free/reduced lunch eligible; this is context about the school, not an explanation for its results.
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