Largest Schools in Issaquah School District (2025)

Schools with the highest enrollment. Ranked by the Success Index (US) from official American data; 27 schools in Issaquah School District, Washington. Rank positions shown on each profile are within United States and Washington.

#	School	Sector	Enrollment	Success Index (US)	Key result	Students
1	Issaquah High School Issaquah · High · Grades 9–12	Public	2,419	80.7 Top 10%	80% Math proficiency	2,419
2	Skyline High School Sammamish · High · Grades 9–12	Public	2,244	81.7 Top 10%	80% Math proficiency	2,244
3	Liberty Sr High School Renton · High · Grades 9–12	Public	1,495	75.6 Top 25%	61% Math proficiency	1,495
4	Pine Lake Middle School Sammamish · Middle · Grades 6–8	Public	877	83.0 Top 10%	79% Math proficiency	877
5	Maywood Middle School Renton · Middle · Grades 6–8	Public	826	78.8 Top 25%	71% Math proficiency	826
6	Issaquah Middle School Issaquah · Middle · Grades 6–8	Public	808	77.4 Top 25%	72% Math proficiency	808
7	Beaver Lake Middle School Issaquah · Middle · Grades 6–8	Public	699	83.7 Top 10%	79% Math proficiency	699
8	Issaquah Valley Elementary Issaquah · Elementary · Grades K–5	Public	646	74.9 Top 25%	68% Math proficiency	646
9	Briarwood Elementary Renton · Elementary · Grades PK–5	Public	630	84.2 Top 10%	79% Math proficiency	630
10	Cougar Mountain Middle School Issaquah · Middle · Grades 6–8	Public	616	65.7 Top 50%	12.3% Free/reduced-price lunch	616
11	Pacific Cascade Middle School Issaquah · Middle · Grades 6–8	Public	605	83.0 Top 10%	80% Math proficiency	605
12	Clark Elementary Issaquah · Elementary · Grades K–5	Public	586	76.7 Top 25%	65% Math proficiency	586
13	Sunny Hills Elementary Sammamish · Elementary · Grades K–5	Public	574	85.1 Top 5%	82% Math proficiency	574
14	Grand Ridge Elementary Issaquah · Elementary · Grades K–5	Public	558	83.4 Top 10%	80% Math proficiency	558
15	Creekside Elementary Sammamish · Elementary · Grades K–5	Public	555	85.3 Top 5%	83% Math proficiency	555
16	Discovery Elementary Issaquah · Elementary · Grades PK–5	Public	508	87.6 Top 5%	90% Math proficiency	508
17	Sunset Elementary Bellevue · Elementary · Grades PK–5	Public	499	87.2 Top 5%	72% Math proficiency	499
18	Apollo Elementary Renton · Elementary · Grades PK–5	Public	496	85.2 Top 5%	76% Math proficiency	496
19	Endeavour Elementary School Issaquah · Elementary · Grades K–5	Public	473	87.3 Top 5%	84% Math proficiency	473
20	Maple Hills Elementary Renton · Elementary · Grades K–5	Public	460	85.6 Top 5%	81% Math proficiency	460
21	Cougar Ridge Elementary Bellevue · Elementary · Grades K–5	Public	458	88.9 Top 5%	89% Math proficiency	458
22	Newcastle Elementary School Newcastle · Elementary · Grades PK–5	Public	451	82.7 Top 10%	79% Math proficiency	451
23	Cascade Ridge Elementary Sammamish · Elementary · Grades K–5	Public	391	86.9 Top 5%	85% Math proficiency	391
24	Cedar Trails Elementary Sammamish · Elementary · Grades K–5	Public	374	76.1 Top 25%	15.5% Free/reduced-price lunch	374
25	Challenger Elementary Issaquah · Elementary · Grades K–5	Public	350	84.3 Top 10%	69% Math proficiency	350
26	Gibson Ek High School Issaquah · High · Grades 9–12	Public	198	68.9 Top 25%	34.5% Math proficiency	198
27	Echo Glen School Snoqualmie · High · Grades 5–12	Public	104	19.9 Lower 50%	5% Math proficiency	104

Issaquah High School in Issaquah leads the 2025 list of largest schools in Issaquah School District with Enrollment 2,419. Of the 27 schools shown, 27 are public.

For the full picture see the wider Washington largest schools rankings, every school on the Issaquah School District page, or the comparison tool to put a shortlist side by side.

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Frequently asked questions

What is the best largest school in Issaquah School District?

Issaquah High School in Issaquah, Washington ranks first among largest schools in Issaquah School District with Enrollment 2,419 (Enrollment: 2,419).

How are largest schools in Issaquah School District ranked?

Schools with the highest enrollment. Only schools eligible for the Success Index (US) are included; the index is shown alongside for context.

Are these 2025 rankings official?

No. They are computed by Success Tutoring from official American data (Urban Institute Education Data Portal (NCES CCD, EDFacts); NCES Common Core of Data). States set their own assessments and proficiency cut scores, so proficiency rates are most comparable within a state. Use the state rankings for like-for-like comparisons.