William S. Hart Union High School District

William S. Hart Union High School District serves 20,685 students across 16 ranked schools in California. The district covers secondary grades only — middle and high school — giving families a focused view of how students progress through the years leading to graduation. Across all 16 campuses, schools average 6.6 out of 10. Several campuses clear that mark by a wide margin, making individual school selection more consequential than district affiliation alone.

Valencia High leads at 8.4 out of 10 — nearly two full points above the district average. That gap signals real performance differentiation within Hart Union. The top school isn't just slightly better than the rest; it meaningfully outpaces them. William S. Hart High scores 7.6 and West Ranch High scores 7.4, both above the district mean and solid options for families in the high school years.

Middle school performance holds up well. Rio Norte Junior High scores 7.6 and Rancho Pico Junior High comes in at 7.5 — both above the 6.6 district average. That consistency at the middle grades suggests students enter the high school pipeline on solid footing. Parents evaluating feeder patterns will want to confirm which junior high serves their address and trace that pipeline into the corresponding high school, since academic profiles differ meaningfully across campuses.

With 16 schools total and a district average of 6.6, Hart Union offers families genuine breadth. The 1.8-point gap between Valencia High and the district mean tells a clear story: quality is real here but not evenly distributed across campuses. Families who treat school selection as a research decision — comparing campus-level scores rather than relying on the district name — stand to gain the most from what Hart Union has to offer.