San Mateo Union High
High school district, grades 09-12 · San Mateo County
69%of district students met the reading (ELA) standard, 2026
51%met the math standard, 2026
7schools on the map
9,099students enrolled in these schools, 2025-26
$1.81Mmedian typical home value across school ZIP codes
In spring 2026, 69% of San Mateo Union High students met the reading standard and 51% met the math standard. In reading, that is 10 points above the San Mateo County average and 20 points above the California average. District reading results in 2026 were about the same as in 2024. Schools in San Mateo Union High are in Burlingame, Millbrae, Redwood City, San Bruno, San Mateo. District boundaries come from the California Department of Education's 2024-25 data; each school's attendance zone is set by the district.
District test scores, 2024 to 2026
| Subject | Spring 2024 | Spring 2025 | Spring 2026 | Change |
|---|---|---|---|---|
| Reading (ELA) | 70% | 73% | 69% | −1 pt |
| Math | 46% | 50% | 51% | +5 pts |
Compared with nearby averages
| Spring 2026 | Reading (ELA) | Math |
|---|---|---|
| San Mateo Union High | 69% | 51% |
| San Mateo County | 59% | 53% |
| California | 49% | 38% |
High schools
| Rank | School | Reading (ELA) | Math | UC admits, fall 2025 | Typical home value (ZIP) |
|---|---|---|---|---|---|
| 1 | Aragon HighSan Mateo · Grades 9-12 | 81% | 65% | 214 | $2.46M |
| 2 | Design Tech High CharterRedwood City · Grades 9-12 | 81% | 59% | 76 | $1.78M |
| 3 | Mills HighMillbrae · Grades 9-12 | 80% | 63% | 136 | $2.06M |
| 4 | Burlingame HighBurlingame · Grades 9-12 | 76% | 61% | 163 | $3.52M |
| 5 | Hillsdale HighSan Mateo · Grades 9-12 | 68% | 43% | 114 | $1.81M |
| 6 | San Mateo HighSan Mateo · Grades 9-12 | 62% | 48% | 131 | $1.20M |
| 7 | Capuchino HighSan Bruno · Grades 9-12 | 51% | 24% | 41 | $1.29M |