| Index | Castine | Ohio | National |
| Average Test Scores | n/a | 61% | 48% |
| Student/Teacher ratio | n/a | 17:1 | 16:1 |
| Total public schools | n/a | 3,650 | 79,221 |
| Total private schools | n/a | 1,000 | 24,874 |
| Total post-secondary schools | n/a | 393 | 7,963 |
| Index | Castine | Ohio | National |
| Completed 8th grade | 73.9% | 86.9% | 84.3% |
| Completed high school | 73.9% | 85.6% | 83.0% |
| Completed some college | 21.7% | 55.7% | 59.4% |
| Completed associate degree | 11.6% | 35.1% | 38.5% |
| Completed bachelors | 1.4% | 26.7% | 30.3% |
| Completed masters | 0.0% | 10.0% | 11.5% |
| Completed professional degree | 0.0% | 2.7% | 3.3% |
| Completed doctorate | 0.0% | 1.1% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Castine. Using the proficiency score averages, the average test scores for Castine, OH schools is n/a. The average student to teacher ratio is n/a. In Castine, OH, an average of 73.9% of students have completed 8th grade and an average of 73.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Pleasant Hill, OH | 1,534 | 80% | 65.6% |
| Brookville, OH | 6,447 | 79% | 63.9% |
| New Madison, OH | 1,122 | 77% | 60.4% |
| Arcanum, OH | 2,515 | 76% | 58.1% |
| Eaton, OH | 8,461 | 73% | 52.1% |
| Castine, OH | 141 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Waterloo, AL | 141 | 40% | 17.7% |
| Jim Falls, WI | 141 | 67% | 39.6% |
| Minto, AK | 140 | 25% | 47.9% |
| Craig, MO | 140 | 50% | 4.2% |
| Atqasuk, AK | 140 | 10% | 79.2% |
| Castine, OH | 141 | n/a |
Here are the best places to live in Ohio
Check out the 10 safest cities in Ohio
These are the 10 cheapest cities in Ohio
Most Dangerous Cities In The US