| Index | Union | Ohio | National |
| Average Test Scores | 69% | 61% | 48% |
| Student/Teacher ratio | 20:1 | 17:1 | 16:1 |
| Total public schools | 1 | 3,650 | 79,221 |
| Total private schools | n/a | 1,000 | 24,874 |
| Total post-secondary schools | n/a | 393 | 7,963 |
| Index | Union | Ohio | National |
| Completed 8th grade | 91.6% | 86.9% | 84.3% |
| Completed high school | 91.4% | 85.6% | 83.0% |
| Completed some college | 57.9% | 55.7% | 59.4% |
| Completed associate degree | 30.1% | 35.1% | 38.5% |
| Completed bachelors | 16.7% | 26.7% | 30.3% |
| Completed masters | 5.0% | 10.0% | 11.5% |
| Completed professional degree | 0.4% | 2.7% | 3.3% |
| Completed doctorate | 0.2% | 1.1% | 1.3% |
There are a total of 1 public schools, n/a private schools and n/a post-secondary schools in Union. Using the proficiency score averages, the average test scores for Union, OH schools is 69%. The average student to teacher ratio is 20:1. In Union, OH, an average of 91.6% of students have completed 8th grade and an average of 91.4% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Casstown, OH | 209 | 83% | 72.6% |
| Pleasant Hill, OH | 1,495 | 80% | 65.6% |
| Beavercreek, OH | 47,343 | 79% | 64.3% |
| Brookville, OH | 6,255 | 79% | 63.9% |
| Arcanum, OH | 2,457 | 76% | 58.1% |
| Union, OH | 6,777 | 69% | 42.7% |
| City | Population | Avg. Test Scores | National Avg. |
| Robertsdale, AL | 6,776 | 51% | 6.3% |
| Kosciusko, MS | 6,778 | 45% | 6.5% |
| Pacific, MO | 6,780 | 45% | 6.0% |
| Thurmont, MD | 6,783 | 46% | 3.9% |
| St. Rose, LA | 6,770 | 78% | 62.5% |
| Union, OH | 6,777 | 69% | 42.7% |
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