| Index | Dexter | New York | National |
| Average Test Scores | 54% | 56% | 48% |
| Student/Teacher ratio | n/a | n/a | 16:1 |
| Total public schools | 2 | 4,060 | 79,221 |
| Total private schools | n/a | 1,092 | 24,874 |
| Total post-secondary schools | n/a | 483 | 7,963 |
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| Index | Dexter | New York | National |
| Completed 8th grade | 84.5% | 83.5% | 84.3% |
| Completed high school | 81.7% | 82.1% | 83.0% |
| Completed some college | 52.0% | 59.5% | 59.4% |
| Completed associate degree | 29.9% | 43.4% | 38.5% |
| Completed bachelors | 15.5% | 34.7% | 30.3% |
| Completed masters | 5.9% | 15.1% | 11.5% |
| Completed professional degree | 3.0% | 4.2% | 3.3% |
| Completed doctorate | 1.7% | 1.5% | 1.3% |
There are a total of 2 public schools, n/a private schools and n/a post-secondary schools in Dexter. Using the proficiency score averages, the average test scores for Dexter, NY schools is 54%. The average student to teacher ratio is n/a. In Dexter, NY, an average of 84.5% of students have completed 8th grade and an average of 81.7% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Calcium, NY | 3,660 | 67% | 39.6% |
| Adams, NY | 1,894 | 66% | 37.0% |
| Theresa, NY | 1,069 | 60% | 25.0% |
| Evans Mills, NY | 460 | 60% | 24.0% |
| Sackets Harbor, NY | 1,585 | 58% | 20.8% |
| Dexter, NY | 812 | 54% | 13.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Grove City, MN | 812 | 53% | 10.9% |
| Morrill, NE | 812 | 43% | 10.4% |
| Minersville, UT | 812 | 55% | 14.1% |
| Anson, ME | 811 | 40% | 16.7% |
| Coahoma, TX | 811 | 41% | 15.6% |
| Dexter, NY | 812 | 54% | 13.0% |
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