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SCHOOL COMMUNITY·WILLIAM S. HART UNION HIGH·NCES 064251014393

Castaic High

31575 Valley Creek Rd., Castaic, CA 91384 · (661) 888-6288 · Los Angeles County
GRADES 09–12HIGH41-RURALREGULAR SCHOOL1,159 STUDENTS
Enrollment
1,159
High
DISTRICT 1,434 · STATE 838
Student : Teacher
23.6:1
49 FTE teachers
DISTRICT 22.7:1 · STATE 18.2:1
Free / Reduced Lunch
22%
260 students
DISTRICT 31% · STATE 65%
Community
6
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.

Enrollment by grade, 2024-25

GradeStudentsShare
Grade 820%
Grade 929926%
Grade 1028725%
Grade 1127724%
Grade 1229425%
Student demographics
64%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 67% · STATE 62% · US 70%
White
40135%
DISTRICT 32% · STATE 20% · US 43%
Hispanic
55748%
DISTRICT 45% · STATE 56% · US 30%
Black
565%
DISTRICT 4% · STATE 5% · US 15%
Asian
938%
DISTRICT 14% · STATE 12% · US 6%
Two+
474%
DISTRICT 4% · STATE 6% · US 5%
Native American
10%
DISTRICT 0% · STATE 0% · US 1%
Pacific Islander
40%
DISTRICT 0% · STATE 0% · US 0%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
63355%
Female
52645%

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Test scores

CAASPP 2024-25 . % met or exceeded standard
English Language Arts
74.4%
CA avg 49.1%
Math
34.4%
CA avg 37.7%

What this means: On the CAASPP, California's statewide test, about 74 of every 100 students at this school read and write at grade level and about 34 of 100 do math at grade level. Across all California schools, those numbers are about 49 and 38.

Performance levels, 2024-25

SubjectStandard ExceededStandard MetStandard Nearly MetStandard Not Met
English Language Arts44.7%29.7%13.9%11.7%
Math15.9%18.5%25.9%39.6%
Share of tested students at each CAASPP level. Each student counts in one level, so a row adds to about 100%.

CAASPP results by year

School yearEnglish Language ArtsMath
2024-2574.4%34.4%
2023-2470.5%29.6%
2022-2369.8%32.1%
2021-2273.8%24.4%
% met or exceeded standard, all students and all tested grades.
Source: CAASPP. All students, all grades. See all years and grades →

BeatsExpectations

Demographically-adjusted score · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
52.7%
composite math + reading, all grades
Predicted
66.4%
based on CA schools with similar FRL share
Beats by
-13.7pp
below demographic expectation

What this means: About 53% of students here test proficient in math and reading, compared with the roughly 66% typical for California schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among California's top nor bottom 10%.

BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

Schools most like Castaic High

Castaic High's state test result (52.7% proficient) is higher than 4 of the 5 schools below with a result.

SchoolStudentsLow-incomeProficient
Castaic High this school1,15922.4%52.7%
Benicia High
Benicia
1,33524.1%51.4%
Woodside High
Woodside
1,66028.7%50.0%
Half Moon Bay High
Half Moon Bay
91125.7%33.7%
Glendora High
Glendora
2,06921.2%60.5%
Alhambra Senior High
Martinez
1,02830.7%40.7%
Matched among California high schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.

Where Castaic High ranks

Among high schools
MeasureThis schoolIn CaliforniaIn Los Angeles County
State test proficiency
ranked highest first
52.7%#282 of 1,052#62 of 228
Math proficiency
ranked highest first
34.4%#354 of 1,056
▲ 27
#78 of 229
no change
Reading proficiency
ranked highest first
74.4%#175 of 1,056
▲ 54
#40 of 229
▲ 12
3-year test score change
ranked biggest gain first
+5.3pp#336 of 1,044#103 of 229
Enrollment
ranked largest first
1,159#704 of 2,093#146 of 486
Students per teacher
ranked fewest first
23.6:1#1,071 of 1,352#296 of 358
Diversity index
ranked most diverse first
63.9%#291 of 1,351#37 of 359
Free and reduced lunch
ranked highest share first
22.4%#1,469 of 1,575#376 of 396
Ranked against other public high schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.

4-year change

SY 2020-21 vs SY 2024-25
Enrollment
1,159
+426 (+58%) vs 2020
Student : Teacher
23.6:1
was 21.6:1
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-251,15949.123.6:122% (260)
2023-241,19357.920.6:122% (264)
2022-231,20855.521.8:122% (261)
2020-217333421.6:128% (203)
Source: NCES Common Core of Data. Rows are the federal collections on file for Castaic High.

About Castaic High

Castaic High is a high school with a street address in Castaic, California. It had 1,159 students in 2024-25, spanning grades 9 through 12. By comparison, high schools in California enroll about 838 students on average.

Castaic High is one school in a 16-school district, William S. Hart Union High, which enrolls 20,465 students.

About 48% of students at Castaic High are Hispanic, the largest single group. After that, the student body is 35% White, 8% Asian, 5% Black, and 4% multiracial. Among Los Angeles County residents, the Hispanic share is about 48%. A diversity index of 64% means there is a 64% chance two randomly chosen students at Castaic High are from different groups.

The school had 49.1 full-time-equivalent teachers in 2024-25. Its student-to-teacher ratio is 23.6:1. Across high schools in California, the average ratio is 18.2:1. The eligibility rate for free or reduced-price meals is 22%. That is 48 points below the 70% average for public schools in Los Angeles County.

Castaic High sits between the top and bottom 10% of California schools on BeatsExpectations, with an actual average proficiency rate across its state test results of 52.7% and a predicted 66.4%.

Los Angeles County is the school's county. There, the median household earns about $90,112 a year, a bachelor's degree or higher is held by about 36% of adults, and the poverty rate is about 10%. Castaic High shares Los Angeles County with 2,243 other public schools.

Castaic Middle is about 1.8 miles away, making it the nearest public school. Castaic High is one of several public schools in the area, with 5 others within five miles. Ranking the closest schools with test data puts Castaic High at 6th of 8.

The federal government classifies Castaic High's location as Rural: Fringe.

Federal counts for Castaic High: 733 students in 2020-21, 1,159 in 2024-25. A gap this wide can follow a change in the grades offered. The ratio was 21.6:1 in 2020-21 and 23.6:1 in 2024-25.

This page is a place to ask questions and share updates about fundraisers, report cards, and school supplies at Castaic High. Parents, students, alumni, and staff are welcome to post.

Los Angeles County at a glance

View full county profile
Population
9,808,667
Census ACS
Median income
$90,112
Household, ACS
Bachelor's+
36%
Adults 25+
Poverty rate
10%
Below federal line
Schools in county
2,244
1,265,907 students

Quick facts

School name
Castaic High
District
William S. Hart Union High
Address
31575 Valley Creek Rd., Castaic, CA 91384
Phone
(661) 888-6288
County
Los Angeles County
Level
High
Grade range
09–12
Total enrollment
1,159
Teachers (FTE)
49
Student–teacher ratio
23.6:1
Free and reduced lunch
260 (22%)
Locale
41-Rural: Fringe
NCES ID
064251014393
Charter school
No
Virtual school
No

Related schools

Other schools in William S. Hart Union High
Other schools in Castaic
Nearby schools

Frequently asked questions

About Castaic High
What is the total enrollment at Castaic High?
Castaic High enrolls approximately 1,159 students in grades 09-12.
What age range does Castaic High serve?
Castaic High serves students from grade 09 through grade 12.
How many students per teacher at Castaic High?
Approximately 23.6:1 students per teacher at Castaic High.
How diverse is Castaic High?
Castaic High reports a student body of 35% White, 48% Hispanic, 5% Black, 8% Asian, 4% Two or more.
What district is Castaic High in?
Castaic High is part of William S. Hart Union High.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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