| Index | Onley | Virginia | National |
| Average Test Scores | 81% | 79% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 1,596 | 79,221 |
| Total private schools | n/a | 553 | 24,874 |
| Total post-secondary schools | n/a | 199 | 7,963 |
| Index | Onley | Virginia | National |
| Completed 8th grade | 93.2% | 85.9% | 84.3% |
| Completed high school | 91.3% | 84.7% | 83.0% |
| Completed some college | 56.8% | 64.1% | 59.4% |
| Completed associate degree | 43.5% | 44.2% | 38.5% |
| Completed bachelors | 27.2% | 36.9% | 30.3% |
| Completed masters | 12.2% | 15.7% | 11.5% |
| Completed professional degree | 2.4% | 4.2% | 3.3% |
| Completed doctorate | 0.5% | 1.7% | 1.3% |
There are a total of n/a public schools, n/a private schools and n/a post-secondary schools in Onley. Using the proficiency score averages, the average test scores for Onley, VA schools is 81%. The average student to teacher ratio is n/a. In Onley, VA, an average of 93.2% of students have completed 8th grade and an average of 91.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| 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% |
| Mappsville, VA | 536 | 69% | 42.7% |
| Onley, VA | 735 | 81% | 68.2% |
| City | Population | Avg. Test Scores | National Avg. |
| Bloomington, WI | 735 | 57% | 18.8% |
| Angel Fire, NM | 735 | 30% | 37.5% |
| Cove, OR | 735 | 60% | 24.0% |
| Belfield, ND | 735 | 47% | 3.1% |
| Superior, MT | 733 | 42% | 13.5% |
| Onley, VA | 735 | 81% | 68.2% |
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