| Index | Union | Mississippi | National |
| Average Test Scores | 58% | 40% | 48% |
| Student/Teacher ratio | 16:1 | 16:1 | 16:1 |
| Total public schools | 1 | 893 | 79,221 |
| Total private schools | n/a | 206 | 24,874 |
| Total post-secondary schools | n/a | 68 | 7,963 |
| Index | Union | Mississippi | National |
| Completed 8th grade | 71.2% | 78.6% | 84.3% |
| Completed high school | 66.0% | 76.7% | 83.0% |
| Completed some college | 46.2% | 52.5% | 59.4% |
| Completed associate degree | 23.7% | 29.8% | 38.5% |
| Completed bachelors | 15.0% | 21.0% | 30.3% |
| Completed masters | 3.6% | 7.9% | 11.5% |
| Completed professional degree | 0.8% | 2.2% | 3.3% |
| Completed doctorate | 0.5% | 0.9% | 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, MS schools is 58%. The average student to teacher ratio is 16:1. In Union, MS, an average of 71.2% of students have completed 8th grade and an average of 66.0% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Decatur, MS | 1,755 | 57% | 17.7% |
| Sebastopol, MS | 325 | 54% | 12.5% |
| Philadelphia, MS | 7,137 | 33% | 31.7% |
| Conehatta, MS | 1,239 | 17% | 64.6% |
| Union, MS | 2,581 | 58% | 20.8% |
| City | Population | Avg. Test Scores | National Avg. |
| Amherst, VA | 2,581 | 82% | 71.7% |
| West Newton, PA | 2,581 | 60% | 24.0% |
| Lewiston, NY | 2,582 | 38% | 21.9% |
| Desert Hills, AZ | 2,580 | 56% | 16.7% |
| Leisure Knoll, NJ | 2,580 | 62% | 28.1% |
| Union, MS | 2,581 | 58% | 20.8% |
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