| Index | Castle Hill | California | National |
| Average Test Scores | n/a | 43% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 8,308 | 79,221 |
| Total private schools | n/a | 3,438 | 24,874 |
| Total post-secondary schools | n/a | 1,085 | 7,963 |
| Index | Castle Hill | California | National |
| Completed 8th grade | 98.1% | 81.1% | 84.3% |
| Completed high school | 98.1% | 79.8% | 83.0% |
| Completed some college | 90.2% | 61.5% | 59.4% |
| Completed associate degree | 66.6% | 39.8% | 38.5% |
| Completed bachelors | 62.2% | 32.0% | 30.3% |
| Completed masters | 21.7% | 11.9% | 11.5% |
| Completed professional degree | 13.1% | 3.9% | 3.3% |
| Completed doctorate | 4.8% | 1.6% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Castle Hill. Using the proficiency score averages, the average test scores for Castle Hill, CA schools is n/a. The average student to teacher ratio is n/a. In Castle Hill, CA, an average of 98.1% of students have completed 8th grade and an average of 98.1% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Orinda, CA | 19,461 | 87% | 81.4% |
| Moraga, CA | 16,896 | 84% | 75.2% |
| Lafayette, CA | 25,949 | 83% | 73.8% |
| Kensington, CA | 5,171 | 80% | 66.7% |
| San Ramon, CA | 81,344 | 78% | 62.9% |
| Castle Hill, CA | 1,164 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| New Columbia, PA | 1,164 | 60% | 24.0% |
| Kings Mills, OH | 1,164 | 83% | 73.5% |
| Ridgeway, VA | 1,165 | 83% | 72.9% |
| Santee, SC | 1,165 | 50% | 4.2% |
| Chisholm, ME | 1,165 | 34% | 30.2% |
| Castle Hill, CA | 1,164 | n/a |
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