Very Good
#2977 of 9,533 schools in CA
Top 31% in state
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
7.2
Grades
9th – 12th
Enrollment
1,193
Student-Teacher
20.9:1
Score
7.2
Grades
9th – 12th
Updated
2022-23
Updated 2022-23
How this school compares
In Castaic
#1 of 6
public schools
California high schools
#543 of 1,892
In district
#4 of 16
William S. Hart Union High
About Castaic High
Castaic High serves 1,193 students in grades 9 through 12, earning a solid 7.0 out of 10 rating from MySchoolScout. The school ranks in the 72nd percentile statewide, placing it at #2,721 among California's 9,566 schools. With 57 full-time equivalent teachers, the student-teacher ratio stands at 20.9 to 1.
Academic performance shows particular strength in English Language Arts, where 71% of students score proficient or above across grade levels. Mathematics presents an area with room for growth, as 30% of students achieve proficiency. The school's overall academic score of 7.5 out of 10 reflects its commitment to student development across all subject areas.
Students at Castaic High come from an affluent community where the median household income reaches $127,416 and the poverty rate remains low at just 4.1%. The surrounding ZIP code 91384 has a population of 27,652, with 32% of residents holding bachelor's degrees or higher. Median home values of $645,600 reflect the area's desirability.
Located on Valley Creek Road, Castaic High sits in a rural setting near the town of Castaic in Los Angeles County, offering students a quieter educational environment while maintaining access to the broader opportunities of Southern California.
What Parents Should Know
The student-teacher ratio at Castaic High is 20.9:1, which is higher than the national average. This may mean larger class sizes, so parents should ask about classroom support, teaching assistants, and how the school differentiates instruction for students who need extra help.
Located in a rural area, Castaic High may involve longer commutes for some families. Rural schools often serve as community anchors and may have smaller class sizes, but parents should consider transportation logistics, after-school program availability, and access to specialized services.
Score Breakdown
Partial Profile · 3/4 metricsRequires 2+ years of test data
View breakdown
View breakdown
View breakdown
Castaic High — Students at Castaic High score 50% proficient, which is below what's typical for similar communities (expected: 63%).
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
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. Valencia High (rated 8.3/10, 6.3 miles away, in nearby Valencia), which scores notably higher. Another option is West Ranch High (rated 7.3/10, 7.1 miles away, in nearby Valencia), with a very similar rating. Additionally, Opportunities for Learning - William S. Hart (rated 5.3/10, 6.4 miles away, in nearby Covina), a more accessible option. 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 | 6.0 |
| Northlake Hills Elementary Castaic | 1.9 mi | 5.2 |
| Castaic Elementary Castaic | 2.0 mi | 6.8 |
| Higher Calling Academy Castaic | 3.2 mi | — |
| Santa Clarita Valley International Castaic | 3.5 mi | 6.2 |
| Live Oak Elementary Castaic | 3.6 mi | 4.5 |
| Trinity Classical Academy Santa Clarita | 5.2 mi | — |
| West Creek Academy Valencia | 5.5 mi | 7.7 |
| Tesoro del Valle Elementary Valencia | 5.7 mi | 8.1 |
| Rio Norte Junior High Santa Clarita | 5.9 mi | 6.9 |
| MONTESSORI OF VALENCIA Valencia | 6.3 mi | 5.2 |
| Valencia High Valencia | 6.3 mi | 8.3 |
| Alpha-Kidz International Valencia | 6.4 mi | — |
| Opportunities for Learning - William S. Hart Covina | 6.4 mi | 5.3 |
| LEGACY CHRISTIAN ACADEMY Valencia | 6.5 mi | 6.2 |
| West Ranch High Valencia | 7.1 mi | 7.3 |
| Oak Hills Elementary Valencia | 7.1 mi | 7.5 |
| Rancho Pico Junior High Stevenson Ranch | 7.3 mi | 6.8 |
| North Park Elementary Valencia | 6.7 mi | 8.0 |
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
Community Profile
The community surrounding Castaic High has a median household income of $129,603. It is an area where 32% of adults hold a bachelor's degree or higher. The median home value in the area is $693,600, with a median rent of $1,730/month. The local poverty rate of 4.5% is relatively low. The average commute for residents is 32 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Abraham Lincoln High Testville, CA | 7.2 |
| Benicia High Benicia, CA | 7.2 |
| Christopher High Gilroy, CA | 7.2 |
| Huntington Park Senior High Huntington Park, CA | 7.2 |
| Marina High Marina, CA | 7.2 |
| Montgomery Senior High San Diego, CA | 7.2 |
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 is ranked #2977 out of 9,533 schools in CA.
What is Castaic High's MySchoolScout rating?
Castaic High has a composite rating of 7.2 out of 10 on MySchoolScout. This score combines academic performance, student growth, and school environment into a single score. Equity data is shown separately for context.
What are the test scores at Castaic High?
Based on the most recent state assessment data, Castaic High has 29.7% math proficiency and 71.1% reading/ELA proficiency.
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.
Explore More Schools
Neighborhood Context
- Walk Score
- 2 Car-Dependent
- County Safety
- Low (245/100K)
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
- Phone
- (661) 888-6288
- Data Year
- 2023–2024
Resources & Links
District
William S. Hart Union High- District Enrollment
- 20,685
- Schools in District
- 16
- Per-Pupil Spending
- $15,278
- District Rank
- #4 of 16
Other Schools in This District
How We Rate Schools
Every school receives a composite score from 1 to 10 based on four pillars: Academic Performance (50%), Student Growth (20%), Equity (15%), and Learning Environment (15%). Scores are built from publicly available data including standardized test results, enrollment figures, and school climate indicators.
Read our full methodologyRelated reading
- Best Elementary Schools in America: 2026 Rankingsbest schools
- Best Public Schools in California 2026: Top-Ranked Elementary, Middle & High Schoolsbest schools
- Best School Districts to Move To in 2026: A Data-Driven Guidebest schools
- Best Schools in Los Angeles, CA — 2026 Rankingsbest schools
- Best Schools in San Diego, CA — 2026 Rankingsbest schools
Get school insights in your inbox
New rankings, best-schools lists, and parent guides — delivered free. No spam, unsubscribe anytime.
We respect your privacy. Unsubscribe at any time.