| Index | Castleton | Vermont | National |
| Average Test Scores | n/a | n/a | 48% |
| Student/Teacher ratio | n/a | 11:1 | 16:1 |
| Total public schools | n/a | 143 | 79,221 |
| Total private schools | n/a | 67 | 24,874 |
| Total post-secondary schools | n/a | 23 | 7,963 |
| Index | Castleton | Vermont | National |
| Completed 8th grade | 85.4% | 89.9% | 84.3% |
| Completed high school | 85.4% | 88.3% | 83.0% |
| Completed some college | 59.1% | 62.0% | 59.4% |
| Completed associate degree | 48.2% | 44.7% | 38.5% |
| Completed bachelors | 41.5% | 36.2% | 30.3% |
| Completed masters | 22.0% | 14.5% | 11.5% |
| Completed professional degree | 0.0% | 4.3% | 3.3% |
| Completed doctorate | 0.0% | 1.8% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Castleton. Using the proficiency score averages, the average test scores for Castleton, VT schools is n/a. The average student to teacher ratio is n/a. In Castleton, VT, an average of 85.4% of students have completed 8th grade and an average of 85.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Fort Ann, NY | 377 | 63% | 31.8% |
| Granville, NY | 2,250 | 45% | 5.7% |
| Whitehall, NY | 2,263 | 37% | 23.4% |
| Castleton, VT | 1,141 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Fayette, IA | 1,141 | 70% | 44.8% |
| Atwater, MN | 1,141 | 50% | 3.1% |
| Castalia, OH | 1,142 | 49% | 1.4% |
| Eddyville, IA | 1,142 | 65% | 34.9% |
| Foreman, AR | 1,142 | 47% | 2.1% |
| Castleton, VT | 1,141 | n/a |
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