| Index | Clark Mills | New York | National |
| Average Test Scores | n/a | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | n/a | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |

| Index | Clark Mills | New York | National |
| Completed 8th grade | 89.3% | 83.5% | 84.3% |
| Completed high school | 89.3% | 82.1% | 83.0% |
| Completed some college | 61.2% | 59.5% | 59.4% |
| Completed associate degree | 38.4% | 43.4% | 38.5% |
| Completed bachelors | 25.2% | 34.7% | 30.3% |
| Completed masters | 8.1% | 15.1% | 11.5% |
| Completed professional degree | 2.9% | 4.2% | 3.3% |
| Completed doctorate | 1.4% | 1.5% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Clark Mills. Using the proficiency score averages, the average test scores for Clark Mills, NY schools is n/a. The average student to teacher ratio is n/a. In Clark Mills, NY, an average of 89.3% of students have completed 8th grade and an average of 89.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Clinton, NY | 2,034 | 71% | 48.3% |
| New Hartford, NY | 1,872 | 71% | 46.9% |
| Holland Patent, NY | 324 | 65% | 35.1% |
| Whitesboro, NY | 3,707 | 64% | 33.1% |
| Waterville, NY | 1,718 | 62% | 29.2% |
| Clark Mills, NY | 1,497 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| New Paris, IN | 1,498 | 59% | 22.9% |
| Griggsville, IL | 1,496 | 25% | 47.9% |
| Ravenna, NE | 1,498 | 58% | 21.4% |
| Kingsley, IA | 1,495 | 76% | 58.3% |
| Yates Center, KS | 1,495 | 29% | 40.6% |
| Clark Mills, NY | 1,497 | n/a |