Casterlin High
🇺🇸 Official data · 2025Blocksburg, California 95514 · Southern Humboldt Joint Unified
About Casterlin High
Casterlin High is a public high located in Blocksburg, in the Southern Humboldt Joint Unified school district of California, United States. It caters for Grades 9–12. In 2025 it enrolled 4 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 57.4 out of 100, placing it in the top 50% of high schools in United States. Its strongest component is students per teacher (57th percentile).
Other published figures: enrollment 4.
There are 2 schools in Blocksburg; Casterlin High ranks 1st of 2 scored schools there.
Success Index (US) breakdown
Each component is a percentile against high schools across United States.
- Math proficiency (30%)–
- Reading proficiency (30%)–
- Community advantage (fewer free/reduced-price lunch) (25%)–
- Students per teacher (15%)2.0
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
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Schools near Casterlin High
Closest schools by straight-line distance, with their Success Index (US).
Similar schools
Public high schools in California with a comparable Enrollment.
Death Valley High Academy
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4 students
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Mountain High
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3 students
Mattole Triple Junction High
Petrolia · Public high · Grades 9–12
2 students
Yosemite Park High
Yosemite · Public high · Grades 9–12
2 students
Cold Springs High
Long Barn · Public high · Grades 9–12
2 students
Frequently asked questions
Is Casterlin High a good school?
Casterlin High has a Success Index (US) of 57.4 out of 100 (Top 50% of high schools in United States). The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Casterlin High rank in California?
Casterlin High is not ranked: schools need a published Enrollment and at least 60 students to be ranked.
How many students attend Casterlin High?
Casterlin High had 4 students in 2025.
Is Casterlin High a elementary school or a high school?
Casterlin High is classified as a high covering Grades 9–12. It is a public school.
What other schools are near Casterlin High?
There are 2 schools within 15 km of Casterlin High; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.