Chinook Middle School

Chinook Middle School is a middle-grades school of moderately sized scale in SeaTac, Washington, overseen by Highline School District, caters to 620 students in grades 6 through 8.

Across the 36 schools in Highline School District (18,072 students total), Chinook Middle School accounts for its share of the district's footprint.

On the student-mix side, Chinook Middle School lists that 40% of students identify as Hispanic, with the remaining enrollment distributed across several groups; the rest consists of 19% Black, 16% Asian, 11% White, 8% Pacific Islander. By comparison, King County as a whole is about 11% Hispanic, so the school skews visibly more Hispanic than its surroundings.

In terms of school funding signals, Chinook Middle School lists 36 full-time-equivalent teachers, putting the student-to-teacher ratio at about 17.4:1. The state averages around 18.9:1, so this campus is tighter than the state norm typical. About 73% of enrolled students meet the income threshold for free or reduced-price lunch, a commonly cited indicator of low-income enrollment. By comparison, King County runs at roughly 38%, so the school's eligibility rate is above the surrounding baseline.

After controlling for student poverty, Chinook Middle School performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 31.3%, the actual is 22.9%, a residual of -8.4 points.

In the area at large, the surrounding county (King County) shows that the typical household earns roughly $124,746 per year, about 57% of the adult population holds a bachelor's degree or above, and roughly 5% of residents live below the federal poverty line. Across King County's 544 public schools (combined enrollment of about 278,492 students), Chinook Middle School is one campus in the mix.

Nearest neighbor: Tyee High School, around 0.1 miles off. 8 of the 8 nearest public schools sit inside a five-mile radius. Among the 5 schools in that immediate cluster with test data (this one included), Chinook Middle School ranks 2nd on composite proficiency, above the local average of 21.4%.

The school occupies a bedroom-community site.

Five-year trend. Looking back 7 years, enrollment at Chinook Middle School has rose 11%, going from 559 students in 2018 to 620 in 2025.

Within the allk12 community for this school, recent activity here tends to focus on classroom updates, athletics, and weather closures. Members of the school community can share what they know.