William S. Hart Union High
Santa Clarita, California · 21,011 students · 16 schools
Enrollment
21,011
Schools
16
Location
Santa Clarita, California
Schools in this district
Saugus HighSaugus, CA
2,378 students
Valencia HighValencia, CA
2,275 students
Golden Valley HighSanta Clarita, CA
2,073 students
William S. Hart HighNewhall, CA
2,034 students
Canyon HighCanyon Country, CA
1,946 students
West Ranch HighValencia, CA
1,865 students
Arroyo Seco Junior HighValencia, CA
1,217 students
Castaic HighCastaic, CA
1,208 students
Rio Norte Junior HighSanta Clarita, CA
1,123 students
La Mesa Junior HighSanta Clarita, CA
1,014 students
Sierra Vista Junior HighCanyon Country, CA
991 students
Placerita Junior HighNewhall, CA
888 students
Methodology & sources
- NCES Common Core of Data (CCD) directory
- U.S. Dept. of Education EDFacts assessment results
- California accountability framework (per-indicator). California publishes per-indicator dashboard ratings instead of a single rollup grade — this projection is a COSMIQ composite over math+ELA proficiency, not an official state rating. Cross-check the state dashboard for the per-indicator view. (as of 2026-05-27)
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Start learning free →About this profile. COSMIQ is an independent, free AI tutoring service and is not affiliated with, endorsed by, or sponsored by William S. Hart Union High, California, or any government education agency. All figures are drawn from public U.S. Department of Education data (NCES Common Core of Data and EDFacts). Any projected rating is an independent estimate, not an official score. COSMIQ does not collect or publish user reviews or ratings of schools.
Data last refreshed July 7, 2026.