| Index | Union | Oregon | National |
| Average Test Scores | 48% | 46% | 48% |
| Student/Teacher ratio | 15:1 | 20:1 | 16:1 |
| Total public schools | 2 | 1,097 | 79,221 |
| Total private schools | n/a | 361 | 24,874 |
| Total post-secondary schools | n/a | 89 | 7,963 |
| Index | Union | Oregon | National |
| Completed 8th grade | 81.5% | 86.3% | 84.3% |
| Completed high school | 81.5% | 85.4% | 83.0% |
| Completed some college | 55.3% | 66.1% | 59.4% |
| Completed associate degree | 26.2% | 39.9% | 38.5% |
| Completed bachelors | 14.6% | 31.4% | 30.3% |
| Completed masters | 5.0% | 11.9% | 11.5% |
| Completed professional degree | 2.1% | 3.6% | 3.3% |
| Completed doctorate | 1.2% | 1.5% | 1.3% |
There are a total of 2 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, OR schools is 48%. The average student to teacher ratio is 15:1. In Union, OR, an average of 81.5% of students have completed 8th grade and an average of 81.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Cove, OR | 735 | 60% | 24.0% |
| Island City, OR | 1,108 | 60% | 24.0% |
| La Grande, OR | 13,380 | 47% | 3.1% |
| North Powder, OR | 616 | 35% | 28.1% |
| Union, OR | 1,841 | 48% | 0.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Waterville, MN | 1,841 | 69% | 42.7% |
| Arkoma, OK | 1,841 | 37% | 22.2% |
| Shannon, MS | 1,841 | 31% | 34.7% |
| Oroville, WA | 1,842 | 41% | 15.1% |
| Fort Hancock, TX | 1,842 | 39% | 19.1% |
| Union, OR | 1,841 | 48% | 0.5% |
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