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For the 2025-26 school year, there are 7 public schools serving 3,816 students in Castaic, CA (there are , serving 9 private students). 100% of all K-12 students in Castaic, CA are educated in public schools (compared to the CA state average of 90%).

The top ranked public schools in Castaic, CA are Castaic Elementary School, Northlake Hills Elementary School and Castaic High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.

Castaic, CA public schools have an average math proficiency score of 37% (versus the California public school average of 34%), and reading proficiency score of 58% (versus the 47% statewide average). Schools in Castaic have an average ranking of 8/10, which is in the top 30% of California public schools.

Minority enrollment is 64% of the student body (majority Hispanic), which is less than the California public school average of 80% (majority Hispanic).