| Index | Onancock | Virginia | National |
| Average Test Scores | n/a | 79% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | 1 | 1,596 | 79,221 |
| Total private schools | n/a | 553 | 24,874 |
| Total post-secondary schools | n/a | 199 | 7,963 |
| Index | Onancock | Virginia | National |
| Completed 8th grade | 81.6% | 85.9% | 84.3% |
| Completed high school | 78.9% | 84.7% | 83.0% |
| Completed some college | 53.1% | 64.1% | 59.4% |
| Completed associate degree | 37.3% | 44.2% | 38.5% |
| Completed bachelors | 31.6% | 36.9% | 30.3% |
| Completed masters | 13.4% | 15.7% | 11.5% |
| Completed professional degree | 3.7% | 4.2% | 3.3% |
| Completed doctorate | 1.2% | 1.7% | 1.3% |
There are a total of 1 public schools, n/a private schools and n/a post-secondary schools in Onancock. Using the proficiency score averages, the average test scores for Onancock, VA schools is n/a. The average student to teacher ratio is n/a. In Onancock, VA, an average of 81.6% of students have completed 8th grade and an average of 78.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Onley, VA | 735 | 81% | 68.2% |
| Tangier, VA | 506 | 78% | 61.5% |
| Melfa, VA | 444 | 75% | 55.2% |
| Accomac, VA | 855 | 72% | 49.0% |
| Exmore, VA | 1,500 | 69% | 43.8% |
| Onancock, VA | 1,160 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Mahnomen, MN | 1,160 | 33% | 30.7% |
| Atglen, PA | 1,160 | 55% | 14.2% |
| Mount Ida, AR | 1,160 | 46% | 4.7% |
| Centreville, MI | 1,159 | 44% | 8.7% |
| Limon, CO | 1,161 | 45% | 7.3% |
| Onancock, VA | 1,160 | n/a |
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