William S. Hart Union High School District
school district in California, United States

The William S. Hart Union High School District (commonly referred to simply as the Hart District) is a school district in the Santa Clarita Valley of Los Angeles County, California. It serves all of the valley's public high school students (grades 9–12) and most of its junior high school students (grades 7–8). As of 2023–24, the total number of enrolled students (in 16 schools) was 22,135. The district's superintendent is Michael Vierra. The district is named after William S. Hart, one of the first western film stars, who lived in Newhall and was a local benefactor. The region served by the Hart District is also served by the Sulphur Springs, Saugus, Castaic, and Newhall elementary school districts.
History
Prior to the establishment of William S. Hart High School in 1945, students in the Santa Clarita Valley continuing after elementary school would attend San Fernando High School in the Pacoima neighborhood of Los Angeles.
Enrollment decline
Between the 2015 and 2019, student enrollment within the Hart District declined 11.7% from an all-time high of 27,155 students during the 2015–16 academic year to 23,968 students during the 2019–2020 academic year. The COVID-19 pandemic continued this downward trend, with student enrollment declining a further 6.5% to 22,469 students during the 2022–23 academic year. During the 2023–24 academic year, the district's total student enrollment was 22,135, down 1.5% from the previous year.
“William S. Hart Union High School District” enters the record as school district in California, United States. Crown Archives preserves that source wording while asking what William, Hart and Union can confirm, complicate or overturn.
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Maps, plans, fabric surveys and administrative records can establish how the site’s name, extent and function changed over time. The source revision retrieved here is dated Sep 17, 2026. The linked authority identifier is Q8017948. Authority coordinates are 34.410, -118.511. None of the 2 selected statements returned an explicit reference. The first chronological checks are 2023, 1945, 2015 and 2019.
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This entry incorporates text from “William S. Hart Union High School District” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.