Castro Valley High

Castro Valley High is one of the sprawling secondary schools in Castro Valley, California, operated by Castro Valley Unified, with 2,874 students on its rolls from grades 9 through 12. That puts it 243% larger than the typical public school in California, which averages around 838 students.

Across the 15 schools in Castro Valley Unified (9,548 students total), Castro Valley High accounts for its share of the district's footprint.

For racial and ethnic makeup, Castro Valley High reports that the most-represented group is Asian (36%), with the rest of the student body spread across multiple groups. Other groups include 25% Hispanic, 21% White, 12% multiracial, 5% Black. That mix tracks the wider county fairly closely.

In terms of school funding signals, On paper, Castro Valley High has 122 full-time-equivalent teachers, translating to a class-load average of around 23.6:1. The state averages around 18.2:1, so this campus is higher than the state norm typical. Roughly 40% of students at Castro Valley High qualify for free or reduced-price lunch, a number frequently used as a low-income enrollment indicator. That share is below Alameda County's rate of about 49%.

After controlling for student poverty, Castro Valley High tracks the demographic baseline. The model predicts 55.6% given the school's FRL share; actual proficiency is 57.7%.

In the broader community, Alameda County reports that median household earnings sit near $129,367, 52% of adults hold a bachelor's degree or higher, and roughly 6% of residents live below the federal poverty line. Across Alameda County's 394 public schools (combined enrollment of about 210,511 students), Castro Valley High is one campus in the mix.

The closest other public school is Castro Valley Elementary, roughly 0.5 miles away. Counting just inside five miles, 8 other public schools cluster around Castro Valley High. Ranking that nearby cluster on reported proficiency puts Castro Valley High at 7th of 8; the average score across the group is 66.9%.

The campus sits in an outer-ring setting.

Five-year trend. Looking back 7 years, enrollment at Castro Valley High has changed only slightly, going from 2,934 students in 2018 to 2,874 in 2025. The White share of enrollment decreased from 28% to 21% over that span.

Inside the community feed, the feed for Castro Valley High typically covers school events, parent volunteer needs, and clubs. Parents, students, alumni, and staff are welcome to weigh in.