Roy A. Johnson High School
| Name | Roy A. Johnson High School |
| Grades | Class 09 to Class 12 |
| Address | PO Box 2146 |
| City | Castro Valley |
| School District | Castro Valley Unified |
| County | Alameda County |
| Zipcode | 94546 |
| Phone No. | (510)537-3000 |
| State | California |
| Suburb | Large |
| Students | 21 |
| Teachers | 2 |
| Student Teacher Ratio | 10.5 students per teacher |
| Charter School | No |
| Magnet School | N/A |
Roy A. Johnson High School is located at PO Box 2146 in Castro Valley city of Alameda County county in California. This school comes under Castro Valley Unified. You can call them at (510)537-3000 for more details. This is not a magnet school. Total twenty one 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 10.5.