Castaic High
🇺🇸 Official data · 2025Castaic, California 91384 · William S. Hart Union High
#264 of 1,343 high schools in California
#6269 of 16,910 nationally
About Castaic High
Castaic High is a public high located in Castaic, in the William S. Hart Union High school district of California, United States. It caters for Grades 9–12. In 2025 it enrolled 1,159 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 58.1 out of 100, placing it in the top 50% of high schools in United States and 264th of 1,343 ranked high schools in California. Its strongest component is community advantage (fewer free/reduced-price lunch) (89th percentile), and its weakest is students per teacher (6th percentile).
Other published figures: enrollment 1,159.
There are 7 schools in Castaic; Castaic High ranks 2nd of 5 scored schools there.
Success Index (US) breakdown
Each component is a percentile against high schools across United States.
- Math proficiency (30%)–
- Reading proficiency (30%)–
- Community advantage (fewer free/reduced-price lunch) (25%)22.4%
- Students per teacher (15%)23.7
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Castaic High by the official sources.
- Enrollment
- 1,159
- Students enrolled in the latest NCES directory year.
- Free/reduced-price lunch
- 22.4%
- Share of students eligible for free or reduced-price lunch.
- Students per teacher
- 23.7
- Enrollment divided by FTE teachers; not class size.
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Schools near Castaic High
Closest schools by straight-line distance, with their Success Index (US).
Castaic Middle
Castaic · Public middle · Grades 7–8
451 students · 2.9 km away
Non-RIS Preschool CMS
Castaic · Public other
· 2.9 km away
Northlake Hills Elementary
Castaic · Public elementary · Grades K–7
556 students · 3.0 km away
Castaic Elementary
Castaic · Public elementary · Grades K–6
417 students · 3.3 km away
Santa Clarita Valley International
Castaic · Charter other · Grades K–12
548 students · 5.6 km away
Live Oak Elementary
Castaic · Public elementary · Grades K–6
490 students · 5.8 km away
West Creek Academy
Valencia · Public elementary · Grades K–6
983 students · 8.8 km away
Tesoro del Valle Elementary
Valencia · Public elementary · Grades K–6
503 students · 9.2 km away
Rio Norte Junior High
Santa Clarita · Public middle · Grades 7–8
1,138 students · 9.5 km away
Valencia High
Valencia · Public high · Grades 9–12
2,286 students · 10 km away
Similar schools
Public high schools in California with a comparable Enrollment.
Natomas High
Sacramento · Public high · Grades 9–12
1,157 students
Atascadero High
Atascadero · Public high · Grades 9–12
1,157 students
Saratoga High
Saratoga · Public high · Grades 9–12
1,161 students
Eureka Senior High
Eureka · Public high · Grades 9–12
1,162 students
Woodland Senior High
Woodland · Public high · Grades 9–12
1,155 students
Ocean View High
Huntington Beach · Public high · Grades 9–12
1,154 students
Frequently asked questions
Is Castaic High a good school?
Castaic High has a Success Index (US) of 58.1 out of 100 (Top 50% of high schools in United States) and ranks #264 of 1,343 in California. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Castaic High rank in California?
Castaic High ranks #264 of 1,343 high schools in California and #6269 of 16,910 nationally on the Success Index (US) (2025 data).
How many students attend Castaic High?
Castaic High had 1,159 students in 2025.
Is Castaic High a elementary school or a high school?
Castaic High is classified as a high covering Grades 9–12. It is a public school.
What other schools are near Castaic High?
There are 10 schools within 15 km of Castaic High; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.