Summary:
ZIP code 98611 has one high school, Castle Rock High School, serving grades 9–12 in the small community of Castle Rock, Washington. The school enrolls 422 students and is part of the Castle Rock School District, so there are no other high schools in the ZIP code for direct comparison.
For parents, the school’s strongest results are its graduation rate and English language arts performance. The 2024–2025 graduation rate was 88%, higher than both the district rate of 86% and the Washington state rate of 82.6%. In 2025–2026, 55.21% of students were proficient in English language arts, slightly above the statewide rate of 52.81% and well above the district rate of 36.39%. ELA performance also improved by 5.74 percentage points from the prior year. The school’s statewide ranking improved as well, moving from the 23rd percentile to the 30th percentile and from a one-star to a two-star rating.
Mathematics is the clearest concern. Only 16.67% of students were proficient in math in 2025–2026, compared with 27.20% districtwide and 43.11% statewide; math performance also declined from 20% the previous year. Science proficiency was 37.65%, below both the district’s 48.62% and the state’s 50.95%, and changed very little year over year. The school’s student-teacher ratio is 17.6 to 1, nearly 48% of students receive free or reduced-price lunch, and spending was $18,746 per student in 2023–2024. The reported dropout rate was 16.2% in 2023–2024, slightly below the district’s 17.8%, though the available state comparison covers a different year. Overall, the school offers encouraging graduation and ELA outcomes, while math, science, and continued student persistence deserve the closest attention.
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