Summary:
Zip code 95403 has 15 schools—elementary, middle, high, and alternative programs—with 5,581 students enrolled; school sizes range from 42 to 1,434. Among schools reporting 2025–26 results, the unweighted average proficiency was 32% in ELA, 21% in math, and 25% in science, below state rates of 49%, 38%, and 36%. Only San Miguel Elementary and Mark West Charter exceeded the state rate in all three subjects. The most important takeaway is that results vary widely from school to school, so the area-wide averages hide substantial differences.
Mark West Charter is a standout across subjects, with 58% proficiency in ELA, 56% in math, and 50% in science; San Miguel Elementary led K–6 schools in ELA at 60% and also scored 50% in math and 45% in science. Mark West Charter’s grade 7–8 results were strong against state results: ELA was 56% and 60%, versus 51% and 49% statewide; math was 54% and 58%, versus 38% and 36%. At the low end, Steele Lane Elementary had the lowest reported ELA score at 11%, Sonoma County Alternative Education Programs had 0% in math, and James Monroe Elementary had 4% in science.
Across the same nine schools with results in both years, average performance moved closer to state levels in ELA and science from 2024–25 to 2025–26, but farther behind in math; individual schools varied, with Mark West Charter gaining 15 points in ELA, 20 in math, and 28 in science. SchoolDigger rankings also tell different stories: San Miguel rose from the 69th to the 74th percentile from 2023–24 to 2025–26, while Mark West Elementary fell from the 72nd to the 51st percentile. The reported free/reduced lunch eligible measure for sy 2024–25 ranged from 45% at San Miguel to 93% at Sonoma County Court; these figures are context, not an explanation for outcomes. Student-teacher ratios ranged from 7.8 to 25.5. All-grades comparisons are broad indicators because schools serve different grade spans.
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