Average
#1725 of 2,228 schools in WA
Chinook Middle School
Middle School · Highline School District
18650 42nd Ave S, Seatac, WA 98188
Enrollment
603
Student-Teacher
16.3:1
Score
5.0
Grades
6th – 8th
Enrollment
603
Student-Teacher
16.3:1
Score
5.0
Grades
6th – 8th
Data vintage
2022-23
Data vintage2022-23
How this school compares
Washington schools
#1,725 of 2,228
In Seatac
#4 of 8
public schools
In district
#18 of 34
Highline School District
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Chinook Middle School
Middle School in Seatac · grades 6th – 8th. Start here, then compare fit against nearby and district options.
Tyee High School
0.1 mi away. Use as a geographic alternative in the same move search.
Bow Lake Elementary
0.3 mi away. Use as a geographic alternative in the same move search.
About Chinook Middle School
Chinook Middle School is a public middle school in Seatac, WA, part of Highline School District. Chinook Middle School serves approximately 603 students, and covers grades 6th-8th, and has a 16.3:1 student-teacher ratio. Chinook Middle School has a current MySchoolScout rating of 5.0 out of 10 and ranks #1,725 of 2,228 schools in WA.
Structured state assessment records for Chinook Middle School show 33% math proficiency (multi-year average, 2009-2024) and 43% reading/ELA proficiency (multi-year average, 2009-2024).
- This school 5.0 · Average
- District avg 4.3
- WA avg 6.0
What Parents Should Know
44% of students at Chinook Middle School were chronically absent in the 2022-23 school year, above the national average. Chronic absenteeism means missing 15 or more school days, and at high rates it drags on classroom pacing for everyone. Ask what the school does to help families get kids to class consistently.
Score Breakdown
Full Profile · 3/3 metricsView breakdown
View breakdown
View breakdown
Chinook Middle School — Students at Chinook Middle School score 20% proficient, which is below what's typical for similar communities (expected: 29%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
76.8%
Students qualifying for federal meal assistance
Test Scores WA SBA (2023-24)
Based on 34 test records from WA state assessments. About our data
Proficiency Trend
↓ DecliningAverage proficiency (% at or above grade level) across Math & ELA over time.
Source: EdFacts (NCES) and state assessment data. Growth score: 5.4/10.
How Chinook Middle School Compares
See how Chinook Middle School performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Programs & Offerings
Data as of 2021-22 · Source: CRDC via Urban Institute · Learn more
Location
18650 42nd Ave S, Seatac, WA 98188
Nearby Alternatives
Families considering Chinook Middle School may also want to explore other middle schools in the area. Showalter Middle School (rated 5.2/10, 2.8 miles away, in nearby Tukwila), with a very similar rating. Additionally, Pacific Middle School (rated 3.6/10, 2.8 miles away, in nearby Des Moines), a more accessible option. For more schools in Seatac, see our Seatac schools guide .
Nearby Schools
20 within 2.1 mi| School | Distance | Rating |
|---|---|---|
| Tyee High School Seatac | 0.1 mi | 2.8 |
| Bow Lake Elementary Seatac | 0.3 mi | 4.7 |
| SEATTLE CHRISTIAN SCHOOLS Seatac | 0.4 mi | 6.6 |
| Valley View Early Childhood Center Seatac | 0.7 mi | 5.1 |
| McMicken Heights Elementary Seatac | 1.3 mi | 8.3 |
| Madrona Elementary Seatac | 1.2 mi | 3.9 |
| Thorndyke Elementary Tukwila | 2.3 mi | 4.7 |
| River Ridge Elementary Seatac | 2.4 mi | 5.3 |
| Impact Public Schools Tukwila | 2.5 mi | 4.8 |
| Impact | Salish Sea Elementary Tukwila | 2.5 mi | 7.4 |
| Cascade Public Schools Des Moines | 2.5 mi | — |
| Foster Senior High School Tukwila | 2.7 mi | 5.2 |
| Tukwila Elementary Tukwila | 2.5 mi | 6.5 |
| Showalter Middle School Tukwila | 2.8 mi | 5.2 |
| Midway Elementary Des Moines | 2.7 mi | 3.8 |
| ST PHILOMENA SCHOOL Des Moines | 2.6 mi | 6.4 |
| Pacific Middle School Des Moines | 2.8 mi | 3.6 |
| Mount Rainier High School Des Moines | 2.8 mi | 5.8 |
| CHOICE Academy Seattle | 2.1 mi | 7.4 |
| Highline Home School Center Burien | 2.1 mi | — |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 98188 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$76,559
Median Home Value
$452,900
Median Rent
$1,641/mo
Population
26,769
College Educated
26.5%
Homeownership
41.6%
Avg Commute
24.1 min
Poverty Rate
9.2%
Median Age
36.8
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Eatonville Middle School Eatonville, WA | 5.0 |
| Highlands Middle School Kennewick, WA | 5.0 |
| Horizon Middle School Ferndale, WA | 5.0 |
| Daybreak Middle Battle Ground, WA | 5.1 |
| Edgemont Jr High Edgewood, WA | 5.1 |
| Glover Middle School Spokane, WA | 5.1 |
Frequently Asked Questions
Common questions about Chinook Middle School
What grades does Chinook Middle School serve?
Chinook Middle School serves students in grades 6th through 8th.
How many students attend Chinook Middle School?
Chinook Middle School has an enrollment of approximately 603 students.
What is the student-teacher ratio at Chinook Middle School?
The student-teacher ratio at Chinook Middle School is 16.3:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Chinook Middle School rank in WA?
Chinook Middle School ranks #1,725 of 2,228 schools in WA.
What is Chinook Middle School's MySchoolScout rating?
Chinook Middle School has a current MySchoolScout rating of 5.0 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at Chinook Middle School?
Based on loaded state assessment records, Chinook Middle School has 33% math proficiency (multi-year average, 2009-2024) and 43% reading/ELA proficiency (multi-year average, 2009-2024).
Is Chinook Middle School a charter school?
No, Chinook Middle School is not a charter school. It is a traditional public school operated by the local school district.
Is Chinook Middle School a Title I school?
No, Chinook Middle School is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Chinook Middle School?
76.8% of students at Chinook Middle School qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Neighborhood Context
Powered by 
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 6th – 8th
- Enrollment
- 603
- Student-Teacher Ratio
- 16.3:1
- Teachers (FTE)
- 37
- Free/Reduced Lunch
- 76.8%
- Type
- regular
- Setting
- Large Suburb
- County
- King County
- Chronic Absenteeism (SY 2022-23)
- 43.6%
- Phone
- (206) 631-5700
Resources & Links
District
Highline School District- District Enrollment
- 17,823
- Schools in District
- 43
- Per-Pupil Spending
- $20,594
- District Rank
- #18 of 34
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