Casterlin High

Casterlin High is a very small high school in Blocksburg, California, administered by Southern Humboldt Joint Unified. Its enrollment is 4 students, spread over grades 9 through 12. High schools in California average about 838 students, which makes this school 100% below average.

The district, Southern Humboldt Joint Unified, operates 8 schools serving 647 students.

Of every 100 students at Casterlin High, about 50 are White, the largest group. Other students are 50% multiracial. That is lower than the 72% White share among all Humboldt County residents.

There are 2 full-time-equivalent teachers at Casterlin High, giving a ratio of 2.0:1. The school's 2.0:1 compares with an average of 18.2:1 for high schools in California.

For the population of Humboldt County, the median household earns about $61,160 a year, a bachelor's degree or higher is held by about 33% of adults, and the poverty rate is about 11%. Across Humboldt County, 92 public schools serve about 17,319 students.

Less than a tenth of a mile separates Casterlin High from the closest public school, Casterlin Elementary. Other public schools within ten miles: 2.

The National Center for Education Statistics classifies the school's location as Rural: Remote, meaning it is in rural territory far from an urban area.

Casterlin High reported 7 students in 2020-21 and 4 in 2024-25. Changes that large sometimes follow a school adding or dropping grades, so the two figures may not cover the same grades. By 2024-25, the school had 2.0 students per teacher, compared with 3.5 in 2020-21.

Anyone can start a thread about fundraisers, report cards, and school supplies at Casterlin High. Teachers and staff are welcome to share updates too.