Enrollment
886
California · 2024-25 NCES data
High school (grades 9-12) · San Marino, CA
San Marino High
Federal NCES profile for San Marino High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 56/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063486005886
👥 S:T ratio 16
📚 AP courses 80
🌟 Gifted program 30
🎓 Counselors 56
📋 Attendance 99
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
San Marino High earns 56/100 on the Resource Investment Index, with class sizes near the California median.
- #1 of 4
- public schools in San Marino · Resource Index
- 56
- Resource Index · Higher
- 21.1:1
- students per teacher
- 9.3%
- free-lunch eligible
San Marino High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, San Marino High ranks #1 of 4 public schools in San Marino, CA.
School address
District: San Marino Unified · California
NCES ID 063486005886 Verify on NCES CCD record →
Teachers (FTE)
42.0
Federal CCD staff survey
Students per teacher
21.1:1
vs 21.5:1 California avg
-2% vs state
Free-lunch eligible
9.3%
vs 55.5% California avg
-83% vs state
Student-teacher ratio in context
How San Marino High compares with California and U.S. medians
What stands out at San Marino High
San Marino High is a lower-poverty, large high school in San Marino, California, enrolling 886 students.
At 21.1:1, its student-teacher ratio sits close to the California median, within a few percentage points of the 21.5:1 state norm, neither notably crowded nor notably small.
Comparatively few students face economic hardship here, 9.3% free-meal eligibility runs 83% below the California average.
Enrollment of 886 puts it in the larger third of California schools by headcount.
Its Resource Investment Index outscores 92% of the 9,998 California schools with a score on record, a top-tier result on this measure.
Among 594 similarly sized, similarly resourced-need California schools statewide, it ranks #33, a top-tier result once campus size and economic need are matched.
Its student body is led by Asian (61%) and White (18%) (diversity index 58/100).
On the academic-pipeline side it reports 16 Advanced Placement courses.
Counselor coverage is strong, about 222 students per counselor, inside the American School Counselor Association's recommended 250:1.
Attendance holds up well here: only 0.3% of students were chronically absent, below the typical post-pandemic national figure.
San Marino Unified also operates Carver Elementary (777 students) and Valentine Elementary (711 students) alongside San Marino High.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How San Marino High compares
San Marino High on the metrics families compare, against California and U.S. means.
| Metric | This school | vs California | California avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 21.1:1 | ▼ 2% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 9.3% | ▼ 83% | 55.5% | 51.7% |
| Enrollment | 886 | top 14% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
21.1:1
Leaner classes than 13% of US schools, heavier class loads than most.
886
Bigger than 88% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
9.3%
free-lunch eligible
- 83% below the California average of 55.5%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
21.1:1
students per teacher
- 2% below state mean
Top 44% in California - lower ratio than 56% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Engagement
0.3%
chronically absent (missed 10%+ of school days)
Below 5%, comfortably under the pre-pandemic national baseline for chronic absenteeism.
Funding equity
$15,051
per pupil, district-wide
- below California avg of $16,509
Somewhat below the U.S. average per-pupil spend; funding constraints may affect programs, facilities, and staffing.
Support staff
Counselors4.0 FTE
Per 222 students, the combined health-and-guidance staffing load for this school.
Discipline context
1
in-school suspensions + 3 out-of-school
Suspension rate: 0.1 per 100 students. Combined in-school and out-of-school rate: 0.5 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
Asian 60.5%
White 18.4%
Two or More 10.6%
Hispanic or Latino 9.4%
African American 0.9%
American Indian / Alaska Native 0.1%
Native Hawaiian / Pacific Islander 0.1%
Largest group: Asian at 60.5% of enrollment.
Student-body diversity index 58.0/100
Simpson diversity index - at 58.0, San Marino High is more mixed than the California school average of 46.0.
Programs
AP courses offered 16
Funding & spending
District-wide per-pupil expenditure for San Marino Unified, which includes San Marino High.
$15,051
Per student
-9%
vs California
Avg $16,509
-9%
vs U.S.
Avg $16,593
Revenue mix
Local 63.7%
State 28.4%
Federal 7.9%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How San Marino High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Carver Elementary | Similar size | Similar economic need | Higher S:T ratio |
| Valentine Elementary | Similar size | Similar economic need | Higher S:T ratio |
| Huntington Middle | Similar size | Similar economic need | Higher S:T ratio |
Comparisons are relative to San Marino High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 777
- Students per teacher
- 27.8:1
- Resource Index
- 30/100
- Enrollment
- 711
- Students per teacher
- 25.4:1
- Resource Index
- 29/100
- Enrollment
- 709
- Students per teacher
- 23.6:1
- Resource Index
- 31/100
Similar high schools statewide
Matched by enrollment size and by staffing ratio across all of California, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~886 students)
Similar student-teacher ratio (~21.1:1)
Next steps
Verify locally before acting on San Marino High's federal record.
- Compare San Marino High against another school. Compare schools
- San Marino Unified's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about San Marino High
How many students attend San Marino High?
San Marino High has 886 students enrolled. It is a high school in San Marino, CA.
What is the student-teacher ratio at San Marino High?
The student-teacher ratio at San Marino High is 21.1:1, which is 2% lower than the California average of 21.5:1 and 34% 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 Marino High?
9.3% of students at San Marino High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of San Marino High?
The largest demographic group at San Marino High is Asian at 60.5% of enrollment, in San Marino, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 58.0/100.
What is the Resource Investment Index for San Marino High?
San Marino High has a Resource Investment Index of 56/100 (higher reported resources relative to schools nationally) based on 5 factors: student-teacher ratio, AP course offerings, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does San Marino High rank among public schools in San Marino?
By Resource Investment Index, San Marino High ranks #1 of 4 public schools in San Marino, CA. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all public schools in San Marino on the city page.
Is San Marino High a good school?
San Marino High earns 56/100 on the Resource Investment Index, with class sizes near the California median. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in San Marino Unified?
Besides San Marino High, San Marino Unified also operates Carver Elementary (777 students), Valentine Elementary (711 students), and Huntington Middle (709 students). See the San Marino Unified district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.