Enrollment
1,159
California · 2024-25 NCES data
High school (grades 9-12) · Castaic, CA
Castaic High
Federal NCES profile for Castaic High, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 34/100.
2024-25 NCES dataHigh school (grades 9-12)NCES 064251014393
👥 S:T ratio 16
📚 AP courses 35
🌟 Gifted program 30
🎓 Counselors 0
📋 Attendance 87
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Castaic High earns 34/100 on the Resource Investment Index, with class sizes near the California median.
- #3 of 6
- public schools in Castaic · Resource Index
- 34
- Resource Index · Typical
- 21.1:1
- students per teacher
- 20.7%
- free-lunch eligible
Castaic High has class sizes near the California median. Computed live against every California school reporting to NCES.
By Resource Investment Index, Castaic High ranks #3 of 6 public schools in Castaic, CA.
School address
District: William S. Hart Union High · California
NCES ID 064251014393 Verify on NCES CCD record →
Teachers (FTE)
55.0
Federal CCD staff survey
Students per teacher
21.1:1
vs 21.5:1 California avg
-2% vs state
Free-lunch eligible
20.7%
vs 55.5% California avg
-63% vs state
Student-teacher ratio in context
How Castaic High compares with California and U.S. medians
What stands out at Castaic High
Castaic High is a large high school in Castaic, California, enrolling 1,159 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, 20.7% free-meal eligibility runs 63% below the California average.
By headcount it is one of the larger campuses in California, bigger than 91% of state schools at 1,159 students.
Its Resource Investment Index sits near the middle of the pack among 9,998 scored California schools.
Against 579 statewide peers matched on enrollment and economic need, it ranks mid-pack at #326.
Its student body is led by Hispanic or Latino (48%) and White (35%) (diversity index 64/100).
On the academic-pipeline side it reports 7 Advanced Placement courses.
Counselor access is stretched at roughly 580 students per counselor, well above the ASCA-recommended 250:1 ceiling.
Attendance holds up well here: only 5.1% of students were chronically absent, below the typical post-pandemic national figure.
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
William S. Hart Union High also operates Saugus High (2,317 students) and Valencia High (2,286 students) alongside Castaic 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 Castaic High compares
Castaic 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 | 20.7% | ▼ 63% | 55.5% | 51.7% |
| Enrollment | 1,159 | top 9% | - | - |
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.
1,159
Bigger than 93% of US schools by enrollment, a large campus nationally.
Equity indicators (what these measure)
Economic need
20.7%
free-lunch eligible
- 63% 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
5.1%
chronically absent (missed 10%+ of school days)
In the 5-10% range, close to the pre-pandemic national baseline.
Funding equity
$14,012
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
Counselors2.0 FTE
Per 580 students, the combined health-and-guidance staffing load for this school.
Discipline context
6
in-school suspensions + 41 out-of-school
Suspension rate: 0.5 per 100 students. Combined in-school and out-of-school rate: 4.1 per 100 students. Reported via the Civil Rights Data Collection. Includes 1 expulsion.
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
Hispanic or Latino 48.1%
White 34.6%
Asian 8.0%
African American 4.8%
Two or More 4.1%
Native Hawaiian / Pacific Islander 0.3%
American Indian / Alaska Native 0.1%
Largest group: Hispanic or Latino at 48.1% of enrollment.
Student-body diversity index 63.9/100
Simpson diversity index - at 63.9, Castaic High is more mixed than the California school average of 46.0.
Programs
AP courses offered 7
Funding & spending
District-wide per-pupil expenditure for William S. Hart Union High, which includes Castaic High.
$14,012
Per student
-15%
vs California
Avg $16,509
-16%
vs U.S.
Avg $16,593
Revenue mix
Local 28.8%
State 59.6%
Federal 11.6%
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 Castaic High Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Saugus High | Larger | Similar economic need | Higher S:T ratio |
| Valencia High | Larger | Similar economic need | Higher S:T ratio |
| Golden Valley High | Larger | Higher economic need | Similar S:T ratio |
| Canyon High | Larger | Higher economic need | Higher S:T ratio |
| William S. Hart High | Larger | Higher economic need | Similar S:T ratio |
Comparisons are relative to Castaic High's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 2,317
- Students per teacher
- 24.4:1
- Resource Index
- 30/100
- Enrollment
- 2,286
- Students per teacher
- 22.9:1
- Resource Index
- 28/100
- Enrollment
- 1,980
- Students per teacher
- 22:1
- Resource Index
- 31/100
- Enrollment
- 1,952
- Students per teacher
- 23.2:1
- Resource Index
- 28/100
- Enrollment
- 1,941
- Students per teacher
- 21.6:1
- Resource Index
- 32/100
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 (~1,159 students)
Similar student-teacher ratio (~21.1:1)
Next steps
Verify locally before acting on Castaic High's federal record.
- Compare Castaic High against another school. Compare schools
- William S. Hart 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 Castaic High
How many students attend Castaic High?
Castaic High has 1,159 students enrolled. It is a high school in Castaic, CA.
What is the student-teacher ratio at Castaic High?
The student-teacher ratio at Castaic 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 Castaic High?
20.7% of students at Castaic High are eligible for free lunch, compared to the California average of 55.5%.
What is the racial and ethnic makeup of Castaic High?
The largest demographic group at Castaic High is Hispanic or Latino at 48.1% of enrollment, in Castaic, CA. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 63.9/100.
What is the Resource Investment Index for Castaic High?
Castaic High has a Resource Investment Index of 34/100 (typical 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 Castaic High rank among public schools in Castaic?
By Resource Investment Index, Castaic High ranks #3 of 6 public schools in Castaic, 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 Castaic on the city page.
Is Castaic High a good school?
Castaic High earns 34/100 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 William S. Hart Union High?
Besides Castaic High, William S. Hart Union High also operates Saugus High (2,317 students), Valencia High (2,286 students), and Golden Valley High (1,980 students). See the William S. Hart 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.