Summary:
ZIP code 98953 has one middle school, Zillah Middle School, serving about 300 students in grades 6–8 within the Zillah School District.
Zillah Middle School has shown gradual improvement in its statewide ranking, moving from the 32nd percentile in 2023–2024 to the 43rd percentile in 2025–2026. Even so, its current ranking remains below the district’s 53rd percentile. In the latest results, 42.28% of students were proficient in English language arts, 35.23% in math, and 40.00% in science. These results were below both district and Washington averages. Science was the closest to the district result, while math was the closest to the state result overall. The school serves a relatively high-need student population, with 72% of students eligible for free or reduced-price lunch. Its reported student-teacher ratio is 18.4 to 1, and per-student spending was $15,801 in 2023–2024.
For parents, the clearest strength is the improvement seen across grade levels, particularly in math. Eighth-grade math proficiency was 38.10%, nearly matching the statewide rate of 38.80%, while eighth-grade ELA proficiency reached 47.62%, the school’s strongest ELA result. Sixth grade was the main area of concern: proficiency was 32.98% in ELA and 31.91% in math, with sixth-grade ELA more than 15 points below the state. Year over year, science improved substantially by 7.71 percentage points, and math rose modestly, but ELA declined by 1.71 points. Overall, families should see a school with positive momentum and especially strong end-of-middle-school math results, while also considering the need for continued support in sixth-grade literacy, foundational math, and science.
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