| Index | Castro Valley | California | National |
| Average Test Scores | 59% | 43% | 48% |
| Student/Teacher ratio | 20:1 | 20:1 | 16:1 |
| Total public schools | 15 | 8,308 | 79,221 |
| Total private schools | 9 | 3,438 | 24,874 |
| Total post-secondary schools | 1 | 1,085 | 7,963 |
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| Index | Castro Valley | California | National |
| Completed 8th grade | 91.6% | 81.1% | 84.3% |
| Completed high school | 91.0% | 79.8% | 83.0% |
| Completed some college | 71.0% | 61.5% | 59.4% |
| Completed associate degree | 46.5% | 39.8% | 38.5% |
| Completed bachelors | 38.4% | 32.0% | 30.3% |
| Completed masters | 13.4% | 11.9% | 11.5% |
| Completed professional degree | 4.6% | 3.9% | 3.3% |
| Completed doctorate | 1.9% | 1.6% | 1.3% |
There are a total of 15 public schools, 9 private schools and 1 post-secondary schools in Castro Valley. Using the proficiency score averages, the average test scores for Castro Valley, CA schools is 59%. The average student to teacher ratio is 20:1. In Castro Valley, CA, an average of 91.6% of students have completed 8th grade and an average of 91.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Orinda, CA | 19,891 | 87% | 81.4% |
| Sunol, CA | 862 | 85% | 76.0% |
| Moraga, CA | 17,346 | 84% | 75.2% |
| Lafayette, CA | 26,574 | 83% | 73.8% |
| Kensington, CA | 5,357 | 80% | 66.7% |
| Castro Valley, CA | 66,114 | 59% | 23.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Tulare, CA | 66,114 | 35% | 26.7% |
| Lorain, OH | 66,173 | 42% | 12.7% |
| Eden Prairie, MN | 65,950 | 71% | 47.5% |
| Lake Elsinore, CA | 66,354 | 34% | 28.7% |
| Port Charlotte, FL | 66,383 | 51% | 7.2% |
| Castro Valley, CA | 66,114 | 59% | 23.8% |
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