Enrollment
1,256
California · 2024-25 NCES data
High school (grades 9-12) · Lafayette, CA
Acalanes High
Federal NCES profile for Acalanes High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 50/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 060165000032
👥 S:T ratio 23
📚 AP courses 95
🌟 Gifted program 30
🎓 Counselors 37
📋 Attendance 64
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Acalanes High earns 50/100 on the Resource Investment Index, with class sizes smaller than 71% of California schools.
- #3 of 6
- public schools in Lafayette · Resource Index
- 50
- Resource Index · Higher
- 19.3:1
- small classes for California
- 7.3%
- free-lunch eligible
Acalanes High has class sizes smaller than 71% of California schools. Computed live against every California school reporting to NCES.
By Resource Investment Index, Acalanes High ranks #3 of 6 public schools in Lafayette, CA.
School address
District: Acalanes Union High · California
NCES ID 060165000032 Verify on NCES CCD record →
Teachers (FTE)
65.0
Federal CCD staff survey
Students per teacher
19.3:1
vs 21.5:1 California avg
-10% vs state
Free-lunch eligible
7.3%
vs 55.5% California avg
-87% vs state
Student-teacher ratio in context
How Acalanes High compares with California and U.S. medians
What stands out at Acalanes High
Acalanes High is a lower-poverty, large high school in Lafayette, California, enrolling 1,256 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, 7.3% free-meal eligibility runs 87% below the California average.
By headcount it is one of the larger campuses in California, bigger than 92% of state schools at 1,256 students.
Its Resource Investment Index lands in the upper third of 9,998 scored California schools.
Against 242 statewide peers matched on enrollment and economic need, it ranks mid-pack at #111.
Its student body is led by White (63%) and Asian (12%) (diversity index 56/100).
On the academic-pipeline side it reports 19 Advanced Placement courses.
Counselor coverage runs a bit thin, about 314 students per counselor, somewhat past the ASCA-recommended 250:1 benchmark.
14.5% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
Acalanes Union High also operates Las Lomas High (1,577 students) and Campolindo High (1,340 students) alongside Acalanes 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 Acalanes High compares
Acalanes 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 | 7.3% | ▼ 87% | 55.5% | 51.7% |
| Enrollment | 1,256 | top 8% | - | - |
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.
1,256
Bigger than 94% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
7.3%
free-lunch eligible
- 87% 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
14.5%
chronically absent (missed 10%+ of school days)
In the 10-15% range, above the pre-pandemic national baseline but within the broader post-pandemic picture.
Funding equity
$17,431
per pupil, district-wide
- above California avg of $16,509
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors4.0 FTE
Per 314 students, the combined health-and-guidance staffing load for this school.
Discipline context
5
in-school suspensions + 16 out-of-school
Suspension rate: 0.4 per 100 students. Combined in-school and out-of-school rate: 1.7 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 63.2%
Asian 12.2%
Hispanic or Latino 12.0%
Two or More 10.8%
African American 1.5%
Native Hawaiian / Pacific Islander 0.2%
American Indian / Alaska Native 0.1%
Largest group: White at 63.2% of enrollment.
Student-body diversity index 55.9/100
Simpson diversity index - at 55.9, Acalanes High is more mixed than the California school average of 46.0.
Programs
AP courses offered 19
Funding & spending
District-wide per-pupil expenditure for Acalanes Union High, which includes Acalanes High.
$17,431
Per student
+6%
vs California
Avg $16,509
+5%
vs U.S.
Avg $16,593
Revenue mix
Local 80.4%
State 14.9%
Federal 4.7%
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 Acalanes High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Las Lomas High | Larger | Similar economic need | Similar S:T ratio |
| Campolindo High | Similar size | Similar economic need | Similar S:T ratio |
| Miramonte High | Similar size | Similar economic need | Similar S:T ratio |
| Acalanes Center for Independent Study | Smaller | Higher economic need | Lower S:T ratio |
Comparisons are relative to Acalanes High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,577
- Students per teacher
- 20:1
- Resource Index
- 35/100
- Enrollment
- 1,340
- Students per teacher
- 19.7:1
- Resource Index
- 45/100
- Enrollment
- 1,167
- Students per teacher
- 18.8:1
- Resource Index
- 41/100
- Enrollment
- 61
- Students per teacher
- 10.2:1
- Resource Index
- 42/100
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 (~1,256 students)
Similar student-teacher ratio (~19.3:1)
Next steps
Verify locally before acting on Acalanes High's federal record.
- Compare Acalanes High against another school. Compare schools
- Acalanes 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 Acalanes High
How many students attend Acalanes High?
Acalanes High has 1,256 students enrolled. It is a high school in Lafayette, CA.
What is the student-teacher ratio at Acalanes High?
The student-teacher ratio at Acalanes 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 Acalanes High?
7.3% of students at Acalanes High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Acalanes High?
The largest demographic group at Acalanes High is White at 63.2% of enrollment, in Lafayette, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 55.9/100.
What is the Resource Investment Index for Acalanes High?
Acalanes High has a Resource Investment Index of 50/100 (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 Acalanes High rank among public schools in Lafayette?
By Resource Investment Index, Acalanes High ranks #3 of 6 public schools in Lafayette, 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 Lafayette on the city page.
Is Acalanes High a good school?
Acalanes High earns 50/100 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 Acalanes Union High?
Besides Acalanes High, Acalanes Union High also operates Las Lomas High (1,577 students), Campolindo High (1,340 students), and Miramonte High (1,167 students). See the Acalanes 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.