| Index | Union | Washington | National |
| Average Test Scores | n/a | 54% | 48% |
| Student/Teacher ratio | n/a | 20:1 | 16:1 |
| Total public schools | n/a | 1,991 | 79,221 |
| Total private schools | n/a | 548 | 24,874 |
| Total post-secondary schools | n/a | 147 | 7,963 |
| Index | Union | Washington | National |
| Completed 8th grade | 100.0% | 87.5% | 84.3% |
| Completed high school | 96.5% | 86.6% | 83.0% |
| Completed some college | 75.1% | 67.7% | 59.4% |
| Completed associate degree | 34.9% | 43.3% | 38.5% |
| Completed bachelors | 30.1% | 33.6% | 30.3% |
| Completed masters | 11.1% | 12.3% | 11.5% |
| Completed professional degree | 5.9% | 3.6% | 3.3% |
| Completed doctorate | 0.0% | 1.5% | 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, WA schools is n/a. The average student to teacher ratio is n/a. In Union, WA, an average of 100.0% of students have completed 8th grade and an average of 96.5% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Vaughn, WA | 1,052 | 60% | 24.0% |
| Grapeview, WA | 703 | 57% | 18.8% |
| Belfair, WA | 4,557 | 39% | 19.8% |
| Shelton, WA | 10,467 | 37% | 24.0% |
| Union, WA | 327 | n/a |
| City | Population | Avg. Test Scores | National Avg. |
| Mentone, AL | 327 | 70% | 45.8% |
| Irwin, IA | 327 | 80% | 66.7% |
| Camp Sherman, OR | 327 | 50% | 4.2% |
| Taloga, OK | 327 | 45% | 6.3% |
| Coleman, OK | 327 | 44% | 9.4% |
| Union, WA | 327 | n/a |
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