Casterlin High School
| Name | Casterlin High School |
| Grades | Class 09 to Class 12 |
| Address | 24790 ALDERPOINT RD. |
| City | Blocksburg |
| School District | Southern Humboldt Joint Unified |
| County | Humboldt County |
| Zipcode | 95514-9308 |
| Phone No. | (707)926-5402 |
| State | California |
| Rural | Remote |
| Students | 7 |
| Teachers | 2 |
| Student Teacher Ratio | 3.5 students per teacher |
| Charter School | No |
| Magnet School | N/A |
Casterlin High School is located at 24790 ALDERPOINT RD. in Blocksburg city of Humboldt County county in California. This school comes under Southern Humboldt Joint Unified. You can call them at (707)926-5402 for more details. This is not a magnet school. Total seven students from class 09 to class 12 study in this school who are taught by two teachers. This is not a charter school. The student teacher ratio of this school is 3.5.