Summary:
ZIP code 98092 has one middle school, Rainier Middle School, serving grades 6–8 in the Auburn area. The school enrolls 907 students and reports a 17.4-to-1 student–teacher ratio. About 61% of students qualify for free or reduced-price lunch, providing important context about the needs of the student population. Because there is only one middle school in the ZIP code, families cannot compare several local schools directly.
Rainier Middle School has mixed academic results. English Language Arts is its strongest subject, with 36.89% of students proficient in 2025–2026. Math is the weakest at 25.48%, while science proficiency is 31.16%. In all three subjects, the school trails both Auburn School District and Washington state overall. However, the grade-level comparison is more favorable: Rainier is slightly above the district in sixth- and eighth-grade ELA and exceeds the district in math for all three grades. Seventh-grade ELA is a relative weakness, with proficiency about four percentage points below the district rate.
Recent results were generally stable rather than showing broad improvement. From the prior year, ELA and math declined slightly, while science improved modestly. The school’s statewide ranking nevertheless improved from the 19th percentile to the 24th percentile over the three years reported, although it remains rated one star. For parents, the main strengths are consistent grade-level performance, comparatively strong math results versus the district, and modest ranking improvement. The main areas to watch are low overall proficiency, especially in math and science, and the need to improve seventh-grade ELA. Per-student spending was reported at $17,157, but spending alone does not determine educational outcomes.
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