Summary:
ZIP code 94523 has 11 schools in Mt. Diablo Unified: six elementary schools, two middle schools, two high schools, and one alternative school. The unweighted school averages were 50% in ELA, 44% in math, and 37% in science, compared with statewide averages of 49%, 38%, and 36%. The most important finding is the sharp divide between schools: the proficiency spread ranged from 65 to 74 percentage points across subjects.
Sequoia Elementary led in all three subjects, with 74% proficiency in ELA, 74% in math, and 66% in science—24, 36, and 30 percentage points above state results. Strandwood Elementary was the strongest broad challenger, ranking second in ELA and science at 66% and 60%. At the lower end, Fair Oaks Elementary had the lowest elementary results: 22% in ELA, 21% in math, and 12% in science. Prospect High (Continuation) was lowest across the full list, at 0% in ELA, 9% in math, and 0% in science. Among traditional high schools, College Park High exceeded state results in all three 11th-grade subjects and had a 98% graduation rate, versus 88% statewide.
Recent changes were mixed: the ELA average’s margin over the state narrowed from 1.4 to 0.7 percentage points, while the math margin narrowed from 6 to 5 points. SchoolDigger’s statewide percentile for Sequoia Elementary rose from 88 to 92 between 2023–24 and 2025–26, and its rating increased from four to five stars. As context, schools reported free/reduced lunch eligibility for 2024–25: Sequoia Elementary was at 22.7%, while Fair Oaks Elementary was at 85.5%; these figures describe different school contexts, not a cause of results. Ratios also varied: Sequoia Elementary reported 28.2 students per teacher and Fair Oaks 23.0.
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