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Chinook Middle School

Q: Is Chinook Middle School a good school?

Chinook Middle School ranks in the bottom 9.9% of Washington middle schools.

Q: How many students attend Chinook Middle School?

In the 2024-25 school year, 620 students attended Chinook Middle School.

Q: What is the racial makeup of Chinook Middle School?

Students at Chinook Middle School are 40% Hispanic, 19% African American, 16% Asian, 11% White, 8% Pacific Islander, 6% Two or more races.

Q: What high school do graduates of Chinook Middle School attend?

Students who attend Chinook Middle School usually go on to attend Tyee High School

Public Grades 6-8

463^rd

SchoolDigger Rank ?

of 514 Washington Middle Schools

Better than 10% of Washington middle schools

Summary

Chinook Middle School is a SeaTac, Washington, school serving 620 students in grades 6–8 within the Highline School District, an urban-area district with a relatively high-need student population.

Chinook’s latest statewide ranking places it 463rd out of 514 Washington middle schools, at the 10th percentile. In 2025–26, 29.44% of students were proficient in English language arts, 15.67% in math, and 33.33% in science. Math is the school’s clearest challenge: proficiency has remained near 15%–17% over the past four years and is well below both district and state results. Science is a relative strength and has improved for three consecutive years, slightly exceeding the district average. Chinook also has a comparatively favorable student-teacher ratio of 17.3, the lowest among the nearby schools reviewed, although the available data do not explain why achievement remains low.

Performance varies by grade and comparison school. Eighth grade is Chinook’s strongest level, exceeding district averages in ELA, math, and science, while sixth- and seventh-grade math results are especially weak. Chinook is close to Pacific Middle School in ELA and math and performs better than Glacier Middle School in all three subjects. Its science results also exceed those at several nearby schools, including Evergreen Middle School, Mill Creek Middle School, and Showalter Middle School. However, it trails the stronger Sylvester Middle School by substantial margins. The most promising improvement opportunities are to apply effective eighth-grade and science practices to earlier grades, strengthen math support, and study how Sylvester achieves stronger results within the same district.

620

Students ?

17.3

Student/teacher ratio ?

$21,795

Per pupil spending ?

72.9%

Free/discounted lunch ?

18650 42nd Ave S
SeaTac, WA 98188-5012

(206) 631-5700

District: Highline School District

Students who attend Chinook Middle School usually attend:

High:

Tyee High School

Feeder schools for Chinook Middle School:

Elementary:	Bow Lake Elementary
	Madrona Elementary
	McMicken Heights Elementary

Racial breakdown:

Hispanic:

40.0%

African American:

19.4%

Asian:

15.6%

See top rated Washington middle schools

Compare Chinook Middle School to nearby middle schools!

At a glance

▬ Ranking trend: Holding steady — 12th percentile in 2016 → 10th in 2026

Worth a look

!Test scores below the Washington average (24% vs 48% meeting standards)

!In the lower quartile statewide (10th percentile)

!Math scores 27 pts below the Washington average

Students meeting standards (2025-2026) ?

This school24%

District avg30%

Washington avg48%

463^rd of 514

Washington public middle schools ?

Bottom 10%▼ down 2 pts since 2016

See the entire ranking list of Washington Middle Schools →

★★★★★

SchoolDigger rating ?

3^rd of 5Middle Schools in the Highline School District

198^th of 238Highline School District among Washington districts

Statewide rank percentile over time (100 = the top-ranked school in the state; click a legend item to add a student group)

Show full rank history (all student groups)

All Students

Year	Avg score	Statewide rank	Washington percentile	Rating
2026	13.5	463 of 514	9.9%	★☆☆☆☆
2025	15.6	464 of 534	13.1%	★☆☆☆☆
2024	13.1	483 of 535	9.7%	☆☆☆☆☆
2023	12.6	487 of 539	9.6%	☆☆☆☆☆
2022	15.6	476 of 541	12.0%	★☆☆☆☆
2021	16.6	457 of 529	13.6%	★☆☆☆☆
2019	25.2	395 of 512	22.9%	★☆☆☆☆
2018	26.3	332 of 437	24.0%	★☆☆☆☆
2017	20.4	354 of 435	18.6%	★☆☆☆☆
2016	16.3	389 of 443	12.2%	★☆☆☆☆
2015	22.7	360 of 445	19.1%	★☆☆☆☆
2013	28.3	383 of 498	23.1%	★☆☆☆☆
2012	27.9	386 of 497	22.3%	★☆☆☆☆
2011	17.2	439 of 492	10.8%	★☆☆☆☆
2010	10.4	450 of 483	6.8%	☆☆☆☆☆
2009	6.0	459 of 476	3.6%	☆☆☆☆☆
2008	10.2	437 of 466	6.2%	☆☆☆☆☆
2007	8.2	447 of 463	3.5%	☆☆☆☆☆
2006	10.4	422 of 449	6.0%	☆☆☆☆☆
2005	9.0	401 of 425	5.6%	☆☆☆☆☆
2004	13.3	390 of 421	7.4%	☆☆☆☆☆

African American

Year	Avg score	Statewide rank	Washington percentile	Rating
2026	25.2	76 of 100	24.0%	★☆☆☆☆
2025	29.7	76 of 101	24.8%	★☆☆☆☆
2024	40.7	51 of 90	43.3%	★★☆☆☆
2023	15.7	85 of 96	11.5%	★☆☆☆☆
2022	31.9	68 of 104	34.6%	★★☆☆☆
2021	43.0	54 of 106	49.1%	★★★☆☆
2019	40.0	62 of 111	44.1%	★★☆☆☆
2018	34.8	40 of 66	39.4%	★★☆☆☆

Asian

Year	Avg score	Statewide rank	Washington percentile	Rating
2026	23.1	91 of 114	20.2%	★☆☆☆☆
2025	19.8	127 of 147	13.6%	★☆☆☆☆
2024	19.9	124 of 148	16.2%	★☆☆☆☆
2023	16.1	124 of 145	14.5%	★☆☆☆☆
2022	22.2	126 of 161	21.7%	★☆☆☆☆
2021	23.6	114 of 149	23.5%	★☆☆☆☆
2019	37.0	100 of 152	34.2%	★★☆☆☆
2018	17.2	109 of 123	11.4%	★☆☆☆☆

English Language Learner

Year	Avg score	Statewide rank	Washington percentile	Rating
2026	22.8	113 of 143	21.0%	★☆☆☆☆
2025	26.2	67 of 96	30.2%	★★☆☆☆
2022	18.5	59 of 63	6.3%	☆☆☆☆☆
2019	34.6	61 of 100	39.0%	★★☆☆☆
2018	35.1	85 of 135	37.0%	★★☆☆☆

Female

Year	Avg score	Statewide rank	Washington percentile	Rating
2026	18.9	368 of 443	16.9%	★☆☆☆☆
2025	21.9	377 of 471	20.0%	★☆☆☆☆
2024	10.1	435 of 464	6.3%	☆☆☆☆☆
2023	10.2	431 of 464	7.1%	☆☆☆☆☆
2022	14.2	428 of 479	10.6%	★☆☆☆☆
2021	15.5	416 of 469	11.3%	★☆☆☆☆
2019	25.4	357 of 452	21.0%	★☆☆☆☆
2018	23.5	300 of 376	20.2%	★☆☆☆☆

Hispanic

Year	Avg score	Statewide rank	Washington percentile	Rating
2026	12.6	329 of 347	5.2%	☆☆☆☆☆
2025	18.2	299 of 347	13.8%	★☆☆☆☆
2024	12.3	323 of 344	6.1%	☆☆☆☆☆
2023	15.7	307 of 336	8.6%	☆☆☆☆☆
2022	16.8	321 of 360	10.8%	★☆☆☆☆
2021	20.2	307 of 353	13.0%	★☆☆☆☆
2019	33.2	232 of 344	32.6%	★★☆☆☆
2018	42.7	151 of 259	41.7%	★★☆☆☆

Homeless

Year	Avg score	Statewide rank	Washington percentile	Rating
2019	56.9	16 of 59	72.9%	★★★★☆

Low Socio Economic Status

Year	Avg score	Statewide rank	Washington percentile	Rating
2026	16.4	409 of 453	9.7%	☆☆☆☆☆
2025	21.9	385 of 457	15.8%	★☆☆☆☆
2024	16.1	406 of 455	10.8%	★☆☆☆☆
2023	14.6	419 of 463	9.5%	☆☆☆☆☆
2022	18.9	426 of 475	10.3%	★☆☆☆☆
2021	21.3	398 of 458	13.1%	★☆☆☆☆
2019	38.7	287 of 448	35.9%	★★☆☆☆
2018	37.0	227 of 349	35.0%	★★☆☆☆

Male

Year	Avg score	Statewide rank	Washington percentile	Rating
2026	10.7	420 of 454	7.5%	☆☆☆☆☆
2025	11.2	431 of 472	8.7%	☆☆☆☆☆
2024	15.6	409 of 466	12.2%	★☆☆☆☆
2023	13.6	424 of 470	9.8%	☆☆☆☆☆
2022	16.3	418 of 480	12.9%	★☆☆☆☆
2021	18.4	399 of 476	16.2%	★☆☆☆☆
2019	24.3	353 of 453	22.1%	★☆☆☆☆
2018	24.5	289 of 371	22.1%	★☆☆☆☆

Multi-racial

Year	Avg score	Statewide rank	Washington percentile	Rating
2026	45.8	123 of 222	44.6%	★★☆☆☆
2025	31.0	177 of 246	28.0%	★☆☆☆☆
2024	35.8	157 of 243	35.4%	★★☆☆☆
2023	37.2	156 of 244	36.1%	★★☆☆☆
2022	40.2	147 of 257	42.8%	★★☆☆☆
2021	24.9	198 of 250	20.8%	★☆☆☆☆
2019	43.0	145 of 246	41.1%	★★☆☆☆

Pacific Islander

Year	Avg score	Statewide rank	Washington percentile	Rating
2021	21.0	19 of 19	0.0%	☆☆☆☆☆
2019	35.6	22 of 31	29.0%	★★☆☆☆

White

Year	Avg score	Statewide rank	Washington percentile	Rating
2026	42.4	248 of 453	45.3%	★★☆☆☆
2025	38.1	305 of 488	37.5%	★★☆☆☆
2024	29.3	361 of 486	25.7%	★☆☆☆☆
2023	26.0	370 of 488	24.2%	★☆☆☆☆
2022	48.1	245 of 488	49.8%	★★★☆☆
2021	58.6	180 of 480	62.5%	★★★☆☆
2019	63.0	152 of 470	67.7%	★★★☆☆
2018	48.9	158 of 325	51.4%	★★★☆☆

How student groups rank statewide ? (each group's percentile vs the same group at other schools — higher is better; the +/- beside each compares the group with this school's overall percentile)

Homeless (2019)73rd percentile+50 vs school

White (2026)45th percentile+35 vs school

Multi-racial (2026)45th percentile+35 vs school

African American (2026)24th percentile+14 vs school

English Language Learner (2026)21st percentile+11 vs school

Asian (2026)20th percentile+10 vs school

Female (2026)17th percentile+7 vs school

Low Socio Economic Status (2026)10th percentile~ school

Male (2026)7th percentile~ school

Hispanic (2026)5th percentile-5 vs school

Pacific Islander (2021)<1st percentile-14 vs school

By subject vs Washington (2025-2026) ?

Science33%-18 vs state

English Language Arts29%-23 vs state

Math16%-27 vs state

★

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Schools Near Chinook Middle School

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Ranking:

E Elementary M Middle H High A Alternative P Private

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2026)				Ranking (2025)				WCAS Science (2026)		SBAC English Language Arts (2026)				SBAC Math (2026)				Per Pupil Expenditures (2024)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients (2025)	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2026)	Statewide Rank (2026)	State Percentile (2026)	SchoolDigger Rating (2026)	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	Rank Change from Previous Year	WCAS Science 8th Grade	WCAS Science All Grades	SBAC English Language Arts 6th Grade	SBAC English Language Arts 7th Grade	SBAC English Language Arts 8th Grade	SBAC English Language Arts All Grades	SBAC Math 6th Grade	SBAC Math 7th Grade	SBAC Math 8th Grade	SBAC Math All Grades	Per Pupil Expenditures Total	Sub-total from Federal Funds	Sub-total from State/Local Funds
Chinook Middle School	Public	6-8	18650 42nd Ave S	SeaTac	98188	King County	Highline School District	No	No	No	Yes	(206) 631-5700	620	36	17.3	72.9%	70 (11.3%)	120 (19.4%)	248 (40.0%)	97 (15.6%)	0 (0.0%)	47 (7.6%)	38 (6.1%)	13.5	463^rd of 514 public middle schools	9.9%		15.6	464^th of 534 public middle schools	13.1%	1	33.3	33.3	27.0	28.3	32.5	29.4	13.2	12.7	20.6	15.7	$21,795	$1,517	$20,278
Showalter Middle School	Public	6-8	4628 S 144th St	Seattle	98168	King County	Tukwila School District	No	No	No	Yes	(206) 901-7800	651	32	20.4	75.4%	50 (7.7%)	121 (18.6%)	243 (37.3%)	164 (25.2%)	5 (0.8%)	31 (4.8%)	36 (5.5%)	10.3	479^th of 514 public middle schools	6.8%		12.4	482^nd of 534 public middle schools	9.7%	3	27.8	27.8	24.3	23.4	27.7	25.0	14.8	14.6	17.5	15.6	$22,084	$2,819	$19,265
Pacific Middle School	Public	6-8	615 S 200th St	Des Moines	98198	King County	Highline School District	No	No	No	Yes	(206) 631-5800	604	33	18.5	74.3%	82 (13.6%)	102 (16.9%)	221 (36.6%)	112 (18.5%)	1 (0.2%)	26 (4.3%)	58 (9.6%)	12.1	468^th of 514 public middle schools	8.9%		11.8	487^th of 534 public middle schools	8.8%	19	20.6	20.6	21.6	31.3	35.8	29.3	10.1	17.2	20.4	15.7	$20,856	$1,431	$19,425
Glacier Middle School	Public	6-8	2450 South 142nd Street	SeaTac	98168	King County	Highline School District	No	No	No	Yes	(206) 631-5300	803	35	22.7	75.5%	50 (6.2%)	61 (7.6%)	477 (59.4%)	126 (15.7%)	8 (1.0%)	27 (3.4%)	49 (6.1%)	4.1	509^th of 514 public middle schools	1.0%		4.4	528^th of 534 public middle schools	1.1%	19	16.1	16.1	11.3	21.7	15.0	16.0	7.7	11.3	9.5	9.5	$20,164	$1,544	$18,620
Sylvester Middle School	Public	6-8	16222 Sylvester Road SW	Burien	98166	King County	Highline School District	No	No	No	Yes	(206) 631-6000	582	30	19.3	49.5%	217 (37.3%)	49 (8.4%)	189 (32.5%)	48 (8.2%)	9 (1.5%)	11 (1.9%)	57 (9.8%)	42.3	282^nd of 514 public middle schools	45.1%		38	319^th of 534 public middle schools	40.3%	37	49.1	49.1	42.5	41.1	45.2	42.7	31.9	33.8	36.0	33.8	$21,126	$1,327	$19,799
Nelsen Middle School	Public	6-8	2403 Jones Ave S	Renton	98055	King County	Renton School District	No	No	No	No	(425) 204-3000	913	42	21.5	58.5%	178 (19.5%)	145 (15.9%)	243 (26.6%)	242 (26.5%)	3 (0.3%)	17 (1.9%)	85 (9.3%)	25.3	384^th of 514 public middle schools	25.3%		25.4	412^th of 534 public middle schools	22.8%	28	38.3	38.3	30.3	40.0	38.9	36.2	24.1	24.6	26.8	25.1	$17,952	$1,015	$16,938
Mill Creek Middle School	Public	6-8	620 Central Ave N	Kent	98032	King County	Kent School District	No	No	No	Yes	(253) 373-7446	866	46	18.9	73.0%	85 (9.8%)	144 (16.6%)	369 (42.6%)	154 (17.8%)	3 (0.3%)	77 (8.9%)	33 (3.8%)	5.2	506^th of 514 public middle schools	1.6%		3.9	532^nd of 534 public middle schools	0.4%	26	18.0	18.0	19.4	20.0	17.8	19.1	11.7	11.2	9.9	11.0	$18,728	$1,086	$17,642
Dimmitt Middle School	Public	6-8	12320 80th Ave S	Seattle	98178	King County	Renton School District	No	No	No	Yes	(425) 204-2800	605	34	17.5	62.3%	64 (10.6%)	141 (23.3%)	172 (28.4%)	157 (26.0%)	4 (0.7%)	21 (3.5%)	46 (7.6%)	30.7	352^nd of 514 public middle schools	31.5%		28	390^th of 534 public middle schools	27.0%	38	32.3	32.3	41.0	41.2	31.4	38.1	33.2	34.3	27.4	31.8	$21,054	$2,276	$18,778
Evergreen Middle School	Public	6-8	26630 40th Ave S	Kent	98031	King County	Federal Way School District	No	No	No	No	(253) 945-5100	810	42	19.2	79.5%	95 (11.7%)	140 (17.3%)	291 (35.9%)	145 (17.9%)	0 (0.0%)	41 (5.1%)	96 (11.9%)	8.2	490^th of 514 public middle schools	4.7%		7.8	512^th of 534 public middle schools	4.1%	22	17.1	17.1	18.8	31.8	22.0	24.4	12.2	18.0	13.5	14.6	$17,943	$1,449	$16,493
Meeker Middle School	Public	6-8	12600 SE 192nd St	Renton	98058	King County	Kent School District	No	No	No	No	(253) 373-7284	779	35	22.1	58.8%	135 (17.3%)	104 (13.4%)	165 (21.2%)	264 (33.9%)	1 (0.1%)	34 (4.4%)	75 (9.6%)	26.3	377^th of 514 public middle schools	26.7%		34.7	342^nd of 534 public middle schools	36.0%	35	36.3	36.3	30.2	38.0	43.8	37.2	23.3	23.1	30.6	25.6	$18,941	$1,076	$17,864

Frequently Asked Questions about Chinook Middle School

What district is Chinook Middle School in?

Highline School District

Is Chinook Middle School a good school?

Chinook Middle School ranks in the bottom 9.9% of Washington middle schools.

What high school do graduates of Chinook Middle School attend?

Students who attend Chinook Middle School usually go on to attend Tyee High School

What is the racial makeup of Chinook Middle School?

Students at Chinook Middle School are 40% Hispanic, 19% African American, 16% Asian, 11% White, 8% Pacific Islander, 6% Two or more races.

How many students attend Chinook Middle School?

In the 2024-25 school year, 620 students attended Chinook Middle School.

Rate Chinook Middle School!

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Latest Washington data All new data »

2025–26 SBAC & WCAS test scoresNewSep 10, 2026

2024–25 dropout rates & graduation ratesJan 8, 2026

2022–23 through 2023–24 school spending dataJan 6, 2026

2024–25 SBAC & WCAS test scoresSep 10, 2025

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau, the Washington State Department of Health and the Washington Office of Superindentent of Public Instruction.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.