Very Good
#1932 of 9,533 schools in CA
Top 20% in state
San Mateo High
High School · San Mateo Union High
506 North Delaware St., San Mateo, CA 94401
Enrollment
1,578
Student-Teacher
18.1:1
Score
7.7
Grades
9th – 12th
Enrollment
1,578
Student-Teacher
18.1:1
Score
7.7
Grades
9th – 12th
Updated
2022-23
Updated 2022-23
How this school compares
In San Mateo
#5 of 19
public schools
California high schools
#331 of 1,892
In district
#4 of 7
San Mateo Union High
School environment
9.3 / 10
Exceptional
About San Mateo High
San Mateo High serves 1,578 students in grades 9-12 as a comprehensive public high school in San Mateo, California. With 87 full-time equivalent teachers, the school maintains an 18.1:1 student-teacher ratio, providing reasonably sized learning environments for its diverse student body. Academically, San Mateo High demonstrates solid performance with a MySchoolScout rating of 7.8 out of 10 and ranks in the 84th percentile statewide at #1550 out of 9566 California schools.
Students show particular strength in English Language Arts, with 66% achieving proficiency or above across grade levels. Mathematics presents more of a growth opportunity, with 43% of students reaching proficiency standards, indicating the school's ongoing focus on strengthening STEM instruction. The school draws from an established community where nearly half of residents hold bachelor's degrees or higher, and the median household income reaches $117,678.
This educated, middle-to-upper-middle-class neighborhood, with a relatively low poverty rate of 9.7%, provides a stable foundation for student learning. The area's median home value of over $1 million reflects the desirability of this San Mateo County location. San Mateo High operates in the heart of a thriving mid-size city that balances suburban comfort with proximity to the broader Bay Area's educational and professional opportunities.
Score Breakdown
Full Profile · 4/4 metricsView breakdown
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San Mateo High — Students at San Mateo High score 55% proficient, which is below what's typical for similar communities (expected: 59%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
28.2%
Students qualifying for federal meal assistance
Test Scores CA CAASPP (2023-24)
Based on 6 test records from CA state assessments. About our data
Proficiency Trend
→ StableAverage proficiency (% at or above grade level) across Math & ELA over time.
Source: EdFacts (NCES) and state assessment data. Growth score: 6.4/10.
How San Mateo High Compares
See how San Mateo High performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Performance Trends
Math proficiency has declined from 50% (2019) to 42.86% (2024). Reading/ELA proficiency has remained stable from 68% (2019) to 66.46% (2024).
Location
506 North Delaware St., San Mateo, CA 94401
Nearby Alternatives
Families considering San Mateo High may also want to explore other high schools in the area. South Hillsborough (rated 9.4/10, 1.1 miles away, in nearby Hillsborough), which scores notably higher. Another option is North Shoreview Montessori (rated 9.1/10, 0.7 miles away), which scores notably higher. Additionally, Burlingame High (rated 9.0/10, 1.0 miles away, in nearby Burlingame), which scores notably higher. For more schools in San Mateo, see our San Mateo schools guide .
Nearby Schools
20 within 1.7 mi| School | Distance | Rating |
|---|---|---|
| Stanbridge Academy San Mateo | 0.1 mi | — |
| STANBRIDGE ACADEMY San Mateo | 0.1 mi | 7.2 |
| College Park Elementary San Mateo | 0.1 mi | 7.0 |
| PACIFIC RIM INT'L SCHOOL San Mateo | 0.4 mi | — |
| Genius Learning Burlingame | 0.4 mi | — |
| Washington Elementary Burlingame | 0.6 mi | 6.2 |
| EPISCOPAL DAY SCHOOL OF ST. MATTHEW San Mateo | 0.8 mi | 8.0 |
| Episcopal Day School of St. Matthew San Mateo | 0.8 mi | — |
| North Shoreview Montessori San Mateo | 0.7 mi | 9.1 |
| San Mateo Park Elementary San Mateo | 0.9 mi | 3.4 |
| ST CATHERINE OF SIENA SCHOOL Burlingame | 0.8 mi | 6.5 |
| South Hillsborough Hillsborough | 1.1 mi | 9.4 |
| Burlingame High Burlingame | 1.0 mi | 9.0 |
| ST TIMOTHY SCHOOL San Mateo | 1.0 mi | 6.3 |
| St. Matthew Catholic San Mateo | 1.3 mi | — |
| Crystal Springs Uplands School Hillsborough | 1.4 mi | — |
| CENTENNIAL MONTESSORI SCHOOL San Mateo | 1.5 mi | 7.4 |
| Sunnybrae Elementary San Mateo | 1.4 mi | 5.0 |
| TULANE MONTESSORI CHILDREN'S HOUSE San Mateo | 1.7 mi | — |
| Baywood Elementary San Mateo | 1.7 mi | 5.1 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 94401 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$121,258
Median Home Value
$1,123,300
Median Rent
$2,713/mo
Population
35,628
College Educated
45.3%
Homeownership
44.4%
Avg Commute
27.1 min
Poverty Rate
10.9%
Median Age
35.9
Community Profile
The community surrounding San Mateo High has a median household income of $121,258. It is a well-educated community where 45% of adults hold a bachelor's degree or higher. The median home value in the area is $1,123,300, with a median rent of $2,713/month. The area has a poverty rate of 10.9%. The average commute for residents is 27 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Alhambra High Alhambra, CA | 7.7 |
| Bonita High San Dimas, CA | 7.7 |
| Cerritos High Cerritos, CA | 7.7 |
| Citrus Valley High Redlands, CA | 7.7 |
| Del Oro High Loomis, CA | 7.7 |
| Fresno High Fresno, CA | 7.7 |
Frequently Asked Questions
Common questions about San Mateo High
What grades does San Mateo High serve?
San Mateo High serves students in grades 9th through 12th.
How many students attend San Mateo High?
San Mateo High has an enrollment of approximately 1,578 students.
What is the student-teacher ratio at San Mateo High?
The student-teacher ratio at San Mateo High is 18.1:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does San Mateo High rank in CA?
San Mateo High is ranked #1932 out of 9,533 schools in CA.
What is San Mateo High's MySchoolScout rating?
San Mateo High has a composite rating of 7.7 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.
What are the test scores at San Mateo High?
Based on the most recent state assessment data, San Mateo High has 45.2% math proficiency and 67.0% reading/ELA proficiency.
Is San Mateo High a charter school?
No, San Mateo High is not a charter school. It is a traditional public school operated by the local school district.
Is San Mateo High a Title I school?
No, San Mateo High is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for San Mateo High?
28.2% of students at San Mateo High qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Explore More Schools
Neighborhood Context
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 1,578
- Student-Teacher Ratio
- 18.1:1
- Teachers (FTE)
- 87
- Free/Reduced Lunch
- 28.2%
- Type
- regular
- Setting
- Midsize City
- County
- San Mateo County
- Phone
- (650) 558-2399
- Data Year
- 2023–2024
Resources & Links
District
San Mateo Union High- District Enrollment
- 8,841
- Schools in District
- 7
- Per-Pupil Spending
- $24,541
- District Rank
- #4 of 7
Other Schools in This District
How We Rate Schools
Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.
Read our full methodologyRelated reading
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