Average
#5554 of 9,539 schools in CA
Castaic High
High School · William S. Hart Union High
31575 Valley Creek Rd., Castaic, CA 91384
Enrollment
1,193
Student-Teacher
20.9:1
Score
6.0
Grades
9th – 12th
Enrollment
1,193
Student-Teacher
20.9:1
Score
6.0
Grades
9th – 12th
Data vintage
2022-23
Data vintage2022-23
How this school compares
California schools
#5,554 of 9,539
In Castaic
#5 of 6
public schools
In district
#14 of 16
William S. Hart Union High
School environment
7.3 / 10
Very Good
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Castaic High
High School in Castaic · grades 9th – 12th. Start here, then compare fit against nearby and district options.
Sloan Canyon Christian Academy
1.3 mi away. Use as a geographic alternative in the same move search.
Castaic Middle
1.8 mi away. Use as a geographic alternative in the same move search.
About Castaic High
Castaic High is a public high school in Castaic, CA, part of William S. Hart Union High. Castaic High serves approximately 1,193 students, and covers grades 9th-12th, and has a 20.9:1 student-teacher ratio.
Castaic High has a current MySchoolScout rating of 6.0 out of 10 and ranks #5,554 of 9,539 schools in CA. Structured state assessment records for Castaic High show 30% math proficiency (2024 CAASPP) and 71% reading/ELA proficiency (2024 CAASPP).
- This school 6.0 · Average
- District avg 7.1
- CA avg 6.5
What Parents Should Know
Castaic High runs 20.9:1 students to teachers, above the national average. That often means bigger classes. Ask how the school supports kids who need extra help, and whether there are teaching assistants or small-group time.
Castaic High sits in a rural area, which can mean longer drives for some families. Rural schools are often community anchors with smaller classes, but check transportation, after-school options, and access to specialized services before you commit.
Score Breakdown
Partial Profile · 3/4 metricsRequires 2+ years of test data
View breakdown
View breakdown
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Castaic High — Students at Castaic High score 50% proficient, which is below what's typical for similar communities (expected: 62%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
22.1%
Students qualifying for federal meal assistance
Component weights adjusted due to data availability.
Test Scores CA CAASPP (2023-24)
Based on 4 test records from CA state assessments. About our data
How Castaic High Compares
See how Castaic High performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Programs & Offerings
Data as of 2021-22 · Source: CRDC via Urban Institute · Learn more
Location
31575 Valley Creek Rd., Castaic, CA 91384
Nearby Alternatives
Families considering Castaic High may also want to explore other high schools in the area. West Ranch High (rated 8.3/10, 7.1 miles away, in nearby Valencia), which scores notably higher. Another option is Valencia High (rated 8.1/10, 6.3 miles away, in nearby Valencia), which scores notably higher. Additionally, Opportunities for Learning - William S. Hart (rated 5.4/10, 6.4 miles away, in nearby Covina), with a comparable rating. For more schools in Castaic, see our Castaic schools guide .
Nearby Schools
20 within 6.7 mi| School | Distance | Rating |
|---|---|---|
| SLOAN CANYON CHRISTIAN ACADEMY Castaic | 1.3 mi | — |
| Castaic Middle Castaic | 1.8 mi | 6.9 |
| Northlake Hills Elementary Castaic | 1.9 mi | 6.6 |
| Castaic Elementary Castaic | 2.0 mi | 6.7 |
| Higher Calling Academy Castaic | 3.2 mi | — |
| Santa Clarita Valley International Castaic | 3.5 mi | 5.7 |
| Live Oak Elementary Castaic | 3.6 mi | 6.2 |
| Trinity Classical Academy Santa Clarita | 5.2 mi | — |
| West Creek Academy Valencia | 5.5 mi | 8.2 |
| Tesoro del Valle Elementary Valencia | 5.7 mi | 7.7 |
| Rio Norte Junior High Santa Clarita | 5.9 mi | 6.3 |
| MONTESSORI OF VALENCIA Valencia | 6.3 mi | 5.2 |
| Valencia High Valencia | 6.3 mi | 8.1 |
| Alpha-Kidz International Valencia | 6.4 mi | — |
| Opportunities for Learning - William S. Hart Covina | 6.4 mi | 5.4 |
| LEGACY CHRISTIAN ACADEMY Valencia | 6.5 mi | 6.2 |
| West Ranch High Valencia | 7.1 mi | 8.3 |
| Oak Hills Elementary Valencia | 7.1 mi | 7.7 |
| Rancho Pico Junior High Stevenson Ranch | 7.3 mi | 8.3 |
| North Park Elementary Valencia | 6.7 mi | 6.8 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 91384 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$129,603
Median Home Value
$693,600
Median Rent
$1,730/mo
Population
27,278
College Educated
31.7%
Homeownership
84.3%
Avg Commute
31.5 min
Poverty Rate
4.5%
Median Age
35.1
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Andrew P. Hill High San Jose, CA | 6.0 |
| Banning High Banning, CA | 6.0 |
| Century High Santa Ana, CA | 6.0 |
| Clairemont High San Diego, CA | 6.0 |
| DAMIEN HIGH SCHOOL La Verne, CA | 6.0 |
| Gilroy High Gilroy, CA | 6.0 |
Frequently Asked Questions
Common questions about Castaic High
What grades does Castaic High serve?
Castaic High serves students in grades 9th through 12th.
How many students attend Castaic High?
Castaic High has an enrollment of approximately 1,193 students.
What is the student-teacher ratio at Castaic High?
The student-teacher ratio at Castaic High is 20.9:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Castaic High rank in CA?
Castaic High ranks #5,554 of 9,539 schools in CA.
What is Castaic High's MySchoolScout rating?
Castaic High has a current MySchoolScout rating of 6.0 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at Castaic High?
Based on loaded state assessment records, Castaic High has 30% math proficiency (2024 CAASPP) and 71% reading/ELA proficiency (2024 CAASPP).
Is Castaic High a charter school?
No, Castaic High is not a charter school. It is a traditional public school operated by the local school district.
Is Castaic High a Title I school?
No, Castaic High is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Castaic High?
22.1% of students at Castaic High qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Neighborhood Context
- Walk Score
- 4 Car-Dependent
Powered by 
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 1,193
- Student-Teacher Ratio
- 20.9:1
- Teachers (FTE)
- 57
- Free/Reduced Lunch
- 22.1%
- Type
- regular
- Setting
- Fringe Rural
- County
- Los Angeles County
- Chronic Absenteeism (SY 2022-23)
- 20.5%
- Phone
- (661) 888-6288
- 4-Year Graduation
- 50%+
Resources & Links
District
William S. Hart Union High- District Enrollment
- 20,685
- Schools in District
- 16
- Per-Pupil Spending
- $15,278
- District Rank
- #14 of 16
Other Schools in This District
How we rate schools
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