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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

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 metrics
Student ProgressNot Available

Requires 2+ years of test data

Academics6.5Above Average33%
Student proficiency on state tests, adjusted for community poverty levels.
View breakdown
Math Proficiency29.6%
Reading/ELA Proficiency70.5%
Math vs. State Avg+1.6 pts
Reading vs. State Avg+14.6 pts
Overall Proficiency50%
Expected (poverty-adj.)63%
vs. Expected-12.8 pts
Adjusted Percentile50th
College Readiness8.3Excellent40%
Graduation rates, AP course participation, and IB availability.
View breakdown
AP Participation22.7%
IB ProgramNo
Resources & Environment6.6Above Average27%
Student-teacher ratio, per-pupil spending, and attendance.
View breakdown
Student-Teacher Ratio20.9:1
Per-Pupil Spending$14,041

Castaic High — Students at Castaic High score 50% proficient, which is below what's typical for similar communities (expected: 63%).

How we calculate scores →

Equity & Diversity

Shown separately, not included in overall score

Free/Reduced Lunch

22.1%

Students qualifying for federal meal assistance

Component weights adjusted due to data availability.

Test Scores CA CAASPP (2023-24)

Math Proficiency 29.7%
School
State
31.8%
ELA Proficiency 71.1%
School
State
51.5%

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.

Overall Score
7.2/10
69th percentile in CA
Academic
6.5/10
6.5/10
Environment
6.6/10
Above average

Funding & Resources

Free/Reduced Lunch
Students eligible for subsidized meals
22%
Teaching Staff
21:1 student-teacher ratio
57 teachers

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.

11 schools nearby View map →

Neighborhood Context

Walk Score
2 Car-Dependent
County Safety
Low (245/100K)

Powered by Walk Score

FBI UCR 2024. County-level only. Data >1 year old.

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
Data Year
2023–2024

District

William S. Hart Union High
District Enrollment
20,685
Schools in District
16
Per-Pupil Spending
$15,278
District Rank
#4 of 16

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 methodology

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