| Index | Union | South Carolina | National |
| Average Test Scores | 34% | 47% | 48% |
| Student/Teacher ratio | 15:1 | 16:1 | 16:1 |
| Total public schools | 5 | 932 | 79,221 |
| Total private schools | 1 | 369 | 24,874 |
| Total post-secondary schools | n/a | 96 | 7,963 |
| Index | Union | South Carolina | National |
| Completed 8th grade | 75.9% | 83.0% | 84.3% |
| Completed high school | 74.8% | 81.6% | 83.0% |
| Completed some college | 47.2% | 56.6% | 59.4% |
| Completed associate degree | 26.6% | 35.6% | 38.5% |
| Completed bachelors | 18.9% | 26.5% | 30.3% |
| Completed masters | 5.6% | 9.6% | 11.5% |
| Completed professional degree | 0.5% | 2.5% | 3.3% |
| Completed doctorate | 0.2% | 1.1% | 1.3% |
There are a total of 5 public schools, 1 private schools and n/a post-secondary schools in Union. Using the proficiency score averages, the average test scores for Union, SC schools is 34%. The average student to teacher ratio is 15:1. In Union, SC, an average of 75.9% of students have completed 8th grade and an average of 74.8% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Pacolet, SC | 2,418 | 41% | 14.6% |
| Jonesville, SC | 938 | 36% | 26.0% |
| Buffalo, SC | 1,020 | 34% | 29.2% |
| Union, SC | 7,716 | 34% | 29.9% |
| City | Population | Avg. Test Scores | National Avg. |
| Wellington, KS | 7,716 | 30% | 37.2% |
| Fort Scott, KS | 7,715 | 24% | 51.0% |
| Waite Park, MN | 7,719 | 17% | 64.6% |
| Leola, PA | 7,720 | 44% | 8.3% |
| Aspen, CO | 7,721 | 52% | 9.0% |
| Union, SC | 7,716 | 34% | 29.9% |
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