- Enrollment
- 1,658
- Students per teacher
- 22.1:1
- Resource Index
- 33/100
High school (grades 9-12) · San Mateo, CA
San Mateo High
Federal NCES profile for San Mateo High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 30/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063498005926
👥 S:T ratio 26
🌟 Gifted program 30
🎓 Counselors 22
📋 Attendance 43
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
San Mateo High earns 30/100 on the Resource Investment Index, even as it posts class sizes smaller than 76% of California schools. It is also more racially and ethnically mixed than most California schools.
- #3 of 3
- high schools in San Mateo · Resource Index
- 30
- Resource Index · Lower
- 18.5:1
- small classes for California
- 26.2%
- free-lunch eligible
San Mateo High has class sizes smaller than 76% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, San Mateo High ranks #3 of 3 high schools in San Mateo, CA.
School address
District: San Mateo Union High · California
NCES ID 063498005926 Verify on NCES CCD record →
CCD year-over-year · 2022-23 → 2023-24
-35 students YoY
San Mateo High held near 1,578 students from 2022-23 to 2023-24 (-35 headcount).
Teacher FTE added 84.6 → 87.7 across the same CCD years.
Source: NCES Common Core of Data public-school universe (2022-23, 2023-24).
Steady CCD campus
-35 students YoY 063498005926 · San Mateo, CA High · MID · TRAD
1,557 enr · 18.5:1 · 26.2% lunch · RII 30
Nearest enrollment peer: Aragon High (1,658 students)
San Mateo High held near 1,578 students from 2022-23 to 2023-24 (-35 headcount). Teacher FTE added 84.6 → 87.7 across the same CCD years. Read with this school → · District book → · California schools → · Find another →
San Mateo High in the enrollment neighbourhood
Fall enrollment among this campus and nearest district peers
- Aragon High
Aragon High
1,658 students
- Hillsdale High
Hillsdale High
1,585 students
- Burlingame Hig
Burlingame High
1,583 students
- This school
San Mateo High
1,557 students
- Mills High
Mills High
1,115 students
- Capuchino High
Capuchino High
1,061 students
What this shows San Mateo High reports 1,557 students on the CCD universe file.
How San Mateo High compares
San Mateo High held steady on CCD headcount: ratios and free-lunch share vs California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 18.5:1 | ▼ 14% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 26.2% | ▼ 53% | 55.5% | 51.7% |
| Enrollment | 1,557 | top 6% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
18.5:1
Leaner classes than 22% of US schools, heavier class loads than most.
1,557
Bigger than 96% of US schools by enrollment, a large campus nationally.
Equity indicators methodology
Economic need
26.2%
free-lunch eligible
- 53% below the California average of 55.5%
Below the 40% Title I threshold; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
18.5:1
students per teacher
- 14% below state mean
Top 24% in California - lower ratio than 76% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
22.9%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$24,423
per pupil, district-wide
- above California avg of $18,665
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors4.0 FTE
Per 389 students, the combined health-and-guidance staffing load for this school.
Discipline context
7
in-school suspensions + 52 out-of-school
Suspension rate: 0.4 per 100 students. Combined in-school and out-of-school rate: 3.8 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
Student demographics
Hispanic or Latino 47.6%
Asian 26.1%
White 15.9%
Two or More 7.5%
Native Hawaiian / Pacific Islander 1.9%
African American 1.0%
Largest group: Hispanic or Latino at 47.6% of enrollment.
Student-body diversity index 67.4/100
Simpson diversity index - at 67.4, San Mateo High is more mixed than the California school average of 46.0.
Programs
AP courses offered 18
District finance for San Mateo Union High reports $24,423 per pupil (NCES F-33) - open the district page for the full revenue mix.
How San Mateo High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Aragon High | Similar size | Lower economic need | Higher S:T ratio |
| Hillsdale High | Similar size | Similar economic need | Similar S:T ratio |
| Burlingame High | Similar size | Lower economic need | Higher S:T ratio |
| Mills High | Smaller | Similar economic need | Higher S:T ratio |
| Capuchino High | Smaller | Similar economic need | Similar S:T ratio |
Comparisons are relative to San Mateo High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,585
- Students per teacher
- 17.2:1
- Resource Index
- 38/100
- Enrollment
- 1,583
- Students per teacher
- 22:1
- Resource Index
- 36/100
- Enrollment
- 1,115
- Students per teacher
- 21:1
- Resource Index
- 38/100
- Enrollment
- 1,061
- Students per teacher
- 17.4:1
- Resource Index
- 33/100
Similar high schools in San Mateo
2 comparable high schools (grades 9-12) serving the same city.
Nationwide high schools with similar size or staffing
Out-of-state peers matched by enrollment and by student-teacher ratio, not the same-city or same-district lists above.
Similar enrollment (~1,557 students)
Frequently asked questions about San Mateo High
How many students attend San Mateo High?
San Mateo High has 1,557 students enrolled. It is a high school in San Mateo, CA. CCD year-over-year: 1,613 (2022-23) → 1,578 (2023-24), nearly flat (-35).
What is the student-teacher ratio at San Mateo High?
The student-teacher ratio at San Mateo High is 18.5:1, which is 14% lower than the California average of 21.5:1 and 18% higher than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at San Mateo High?
26.2% of students at San Mateo High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of San Mateo High?
The largest demographic group at San Mateo High is Hispanic or Latino at 47.6% of enrollment, in San Mateo, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 67.4/100.
What is the Resource Investment Index for San Mateo High?
San Mateo High has a Resource Investment Index of 30/100 (lower reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, gifted-program reporting, counselor availability, chronic absenteeism. Not a test-score or academic measure (national median ~41/100, see methodology).
How does San Mateo High rank among high schools in San Mateo?
By Resource Investment Index, San Mateo High ranks #3 of 3 high schools in San Mateo, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all high schools in San Mateo on the city page.
What other schools are in San Mateo Union High?
Besides San Mateo High, San Mateo Union High also operates Aragon High (1,658 students), Hillsdale High (1,585 students), and Burlingame High (1,583 students). See the San Mateo Union High district page for the complete list.