Enrollment
1,470
California · 2024-25 NCES data
High school (grades 9-12) · Mill Valley, CA
Tamalpais High
Federal NCES profile for Tamalpais High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 52/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 063879006526
👥 S:T ratio 23
📚 AP courses 90
🌟 Gifted program 30
🎓 Counselors 58
📋 Attendance 59
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Tamalpais High earns 52/100 on the Resource Investment Index, with class sizes smaller than 71% of California schools.
- #3 of 7
- public schools in Mill Valley · Resource Index
- 52
- Resource Index · Higher
- 19.3:1
- small classes for California
- 10.0%
- free-lunch eligible
Tamalpais High has class sizes smaller than 71% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Tamalpais High ranks #3 of 7 public schools in Mill Valley, CA.
School address
District: Tamalpais Union High · California
NCES ID 063879006526 Verify on NCES CCD record →
Teachers (FTE)
76.0
Federal CCD staff survey
Students per teacher
19.3:1
vs 21.5:1 California avg
-10% vs state
Free-lunch eligible
10.0%
vs 55.5% California avg
-82% vs state
Student-teacher ratio in context
How Tamalpais High compares with California and U.S. medians
What stands out at Tamalpais High
Tamalpais High is a lower-poverty, large high school in Mill Valley, California, enrolling 1,470 students.
Class sizes run a bit leaner than typical: 19.3:1 puts it in the smaller third of California schools by student-teacher ratio.
Comparatively few students face economic hardship here, 10.0% free-meal eligibility runs 82% below the California average.
By headcount it is one of the larger campuses in California, bigger than 93% of state schools at 1,470 students.
Its Resource Investment Index lands in the upper third of 9,998 scored California schools.
Against 228 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #56.
Its student body is led by White (69%) and Hispanic or Latino (12%) (diversity index 49/100).
On the academic-pipeline side it reports 18 Advanced Placement courses.
Counselor coverage is strong, about 210 students per counselor, inside the American School Counselor Association's recommended 250:1.
16.6% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
The surrounding Tamalpais Union High spends $20,137 per pupil, 22% above the California average, a better-resourced district than most.
Tamalpais Union High also operates Redwood High (1,722 students) and Archie Williams High (1,141 students) alongside Tamalpais 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 Tamalpais High compares
Tamalpais 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 | 19.3:1 | ▼ 10% | 21.5:1 | 15.7:1 |
| Free-lunch eligible | 10.0% | ▼ 82% | 55.5% | 51.7% |
| Enrollment | 1,470 | top 7% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
19.3:1
Leaner classes than 19% of US schools, heavier class loads than most.
1,470
Bigger than 96% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
10.0%
free-lunch eligible
- 82% 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
19.3:1
students per teacher
- 10% below state mean
Top 29% in California - lower ratio than 71% of state schools
Between 16:1 and 20:1, squarely in the typical U.S. public-school staffing range.
Engagement
16.6%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$20,137
per pupil, district-wide
- above California avg of $16,509
Well above the U.S. public-school average, reflecting substantially higher local or state investment per enrolled student.
Support staff
Counselors7.0 FTE
Per 210 students, the combined health-and-guidance staffing load for this school.
Discipline context
1
in-school suspensions + 7 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
White 69.1%
Hispanic or Latino 11.9%
Two or More 10.1%
Asian 5.2%
African American 3.3%
Native Hawaiian / Pacific Islander 0.3%
American Indian / Alaska Native 0.2%
Largest group: White at 69.1% of enrollment.
Student-body diversity index 49.4/100
Simpson diversity index - at 49.4, Tamalpais High is more mixed than the California school average of 46.0.
Programs
AP courses offered 18
Funding & spending
District-wide per-pupil expenditure for Tamalpais Union High, which includes Tamalpais High.
$20,137
Per student
+22%
vs California
Avg $16,509
+21%
vs U.S.
Avg $16,593
Revenue mix
Local 86.3%
State 9.9%
Federal 3.8%
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 Tamalpais High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Redwood High | Similar size | Similar economic need | Similar S:T ratio |
| Archie Williams High | Similar size | Similar economic need | Similar S:T ratio |
| Tamiscal High (Alternative) | Smaller | Similar economic need | Lower S:T ratio |
| San Andreas High (Continuation) | Smaller | Higher economic need | Lower S:T ratio |
Comparisons are relative to Tamalpais High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,722
- Students per teacher
- 18.9:1
- Resource Index
- 44/100
- Enrollment
- 1,141
- Students per teacher
- 18.1:1
- Resource Index
- 40/100
- Enrollment
- 124
- Students per teacher
- 12.4:1
- Resource Index
- 61/100
- Enrollment
- 46
- Students per teacher
- 9.2:1
- Resource Index
- 61/100
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 (~1,470 students)
Similar student-teacher ratio (~19.3:1)
Next steps
Verify locally before acting on Tamalpais High's federal record.
- Compare Tamalpais High against another school. Compare schools
- Tamalpais Union High'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 Tamalpais High
How many students attend Tamalpais High?
Tamalpais High has 1,470 students enrolled. It is a high school in Mill Valley, CA.
What is the student-teacher ratio at Tamalpais High?
The student-teacher ratio at Tamalpais High is 19.3:1, which is 10% lower than the California average of 21.5:1 and 23% 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 Tamalpais High?
10.0% of students at Tamalpais High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Tamalpais High?
The largest demographic group at Tamalpais High is White at 69.1% of enrollment, in Mill Valley, CA.
What is the Resource Investment Index for Tamalpais High?
Tamalpais High has a Resource Investment Index of 52/100 (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 Tamalpais High rank among public schools in Mill Valley?
By Resource Investment Index, Tamalpais High ranks #3 of 7 public schools in Mill Valley, 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 Mill Valley on the city page.
Is Tamalpais High a good school?
Tamalpais High earns 52/100 on the Resource Investment Index, with class sizes smaller than 71% of California schools. 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 Tamalpais Union High?
Besides Tamalpais High, Tamalpais Union High also operates Redwood High (1,722 students), Archie Williams High (1,141 students), and Tamiscal High (Alternative) (124 students). See the Tamalpais Union High 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.