| Index | Union | New Hampshire | National |
| Average Test Scores | n/a | 52% | 48% |
| Student/Teacher ratio | n/a | 13:1 | 16:1 |
| Total public schools | n/a | 234 | 79,221 |
| Total private schools | n/a | 144 | 24,874 |
| Total post-secondary schools | n/a | 40 | 7,963 |
| Index | Union | New Hampshire | National |
| Completed 8th grade | 73.3% | 89.5% | 84.3% |
| Completed high school | 73.3% | 88.4% | 83.0% |
| Completed some college | 19.8% | 64.2% | 59.4% |
| Completed associate degree | 19.8% | 45.3% | 38.5% |
| Completed bachelors | 19.8% | 35.5% | 30.3% |
| Completed masters | 0.0% | 13.4% | 11.5% |
| Completed professional degree | 0.0% | 3.3% | 3.3% |
| Completed doctorate | 0.0% | 1.4% | 1.3% |
There are a total of n/a 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, NH schools is n/a. The average student to teacher ratio is n/a. In Union, NH, an average of 73.3% of students have completed 8th grade and an average of 73.3% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Rochester, NH | 31,305 | 52% | 8.8% |
| Wolfeboro, NH | 3,352 | 49% | 1.6% |
| Sanbornville, NH | 778 | 46% | 5.2% |
| North Berwick, ME | 1,716 | 46% | 5.2% |
| Sanford, ME | 21,166 | 43% | 10.2% |
| Union, NH | 242 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Talmo, GA | 242 | 47% | 2.1% |
| Johnson, NE | 242 | 68% | 42.2% |
| Seneca, OR | 242 | 50% | 4.2% |
| West Sunbury, PA | 242 | 56% | 17.2% |
| Brookville, KS | 242 | 20% | 59.4% |
| Union, NH | 242 | n/a |
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