| Index | Zillah | Washington | National |
| Average Test Scores | 57% | 54% | 48% |
| Student/Teacher ratio | 20:1 | 20:1 | 16:1 |
| Total public schools | 4 | 1,991 | 79,221 |
| Total private schools | 1 | 548 | 24,874 |
| Total post-secondary schools | n/a | 147 | 7,963 |
| Index | Zillah | Washington | National |
| Completed 8th grade | 74.2% | 87.5% | 84.3% |
| Completed high school | 72.9% | 86.6% | 83.0% |
| Completed some college | 45.1% | 67.7% | 59.4% |
| Completed associate degree | 27.3% | 43.3% | 38.5% |
| Completed bachelors | 17.5% | 33.6% | 30.3% |
| Completed masters | 8.6% | 12.3% | 11.5% |
| Completed professional degree | 0.6% | 3.6% | 3.3% |
| Completed doctorate | 0.4% | 1.5% | 1.3% |
There are a total of 4 public schools, 1 private schools and n/a post-secondary schools in Zillah. Using the proficiency score averages, the average test scores for Zillah, WA schools is 57%. The average student to teacher ratio is 20:1. In Zillah, WA, an average of 74.2% of students have completed 8th grade and an average of 72.9% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Moxee, WA | 4,222 | 65% | 35.4% |
| Union Gap, WA | 6,326 | 57% | 17.7% |
| Yakima, WA | 97,434 | 48% | 0.2% |
| Sunnyside, WA | 17,266 | 45% | 6.4% |
| Outlook, WA | 164 | 35% | 27.1% |
| Zillah, WA | 3,240 | 57% | 19.5% |
| City | Population | Avg. Test Scores | National Avg. |
| Crystal River, FL | 3,240 | 54% | 13.0% |
| Bandon, OR | 3,240 | 49% | 1.4% |
| Lake Orion, MI | 3,240 | 61% | 26.9% |
| Liberty, SC | 3,240 | 46% | 3.6% |
| Spearman, TX | 3,239 | 60% | 24.0% |
| Zillah, WA | 3,240 | 57% | 19.5% |
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