Schools in Mercer Island, Washington (2025)
6 schools · 3,993 students · 6 public · median Enrollment 431.
Mercer Island, in Washington, has 6 schools in United States's 2025 data, together educating about 3,993 students. By level there are 4 elementary, 1 high, 1 middle; by sector 6 public.
The median Enrollment across Mercer Island's schools is 431, above the Washington median of 426. Students enrolled in the latest NCES directory year.
6 of the 6 schools qualify for the Success Index (US). The highest-scoring is Island Park Elementary (89.7, top 5% of elementary schools nationally), followed by Lakeridge Elementary School (87.4, top 5% of elementary schools nationally), and West Mercer Elementary (86.8, top 5% of elementary schools nationally). 6 schools sit in the top 10% of United States for their type. Scores are percentiles within school type, so compare an elementary school with other elementary schools.
The largest schools are Mercer Island High School (1,439 students), Islander Middle School (960 students), West Mercer Elementary (431 students).
Ranked schools in Mercer Island
Ordered by Success Index (US). Rank positions shown on each profile are within United States and Washington.
- 190Island Park ElementaryMercer Island · Public Elementary83% Math proficiency · 364 students
- 287Lakeridge Elementary SchoolMercer Island · Public Elementary87% Math proficiency · 401 students
- 387West Mercer ElementaryMercer Island · Public Elementary81% Math proficiency · 431 students
- 487Mercer Island High SchoolMercer Island · Public High90% Math proficiency · 1,439 students
- 585Northwood Elementary SchoolMercer Island · Public Elementary77% Math proficiency · 398 students
- 684Islander Middle SchoolMercer Island · Public Middle81% Math proficiency · 960 students
| # | School | Sector | Success Index (US) | Key result | Students |
|---|---|---|---|---|---|
| 1 | Island Park Elementary Mercer Island · Elementary · Grades K–5 | Public | 89.7 Top 5% | 83% Math proficiency | 364 |
| 2 | Lakeridge Elementary School Mercer Island · Elementary · Grades K–5 | Public | 87.4 Top 5% | 87% Math proficiency | 401 |
| 3 | West Mercer Elementary Mercer Island · Elementary · Grades K–5 | Public | 86.8 Top 5% | 81% Math proficiency | 431 |
| 4 | Mercer Island High School Mercer Island · High · Grades 9–12 | Public | 86.7 Top 5% | 90% Math proficiency | 1,439 |
| 5 | Northwood Elementary School Mercer Island · Elementary · Grades PK–5 | Public | 85.4 Top 5% | 77% Math proficiency | 398 |
| 6 | Islander Middle School Mercer Island · Middle · Grades 6–8 | Public | 83.8 Top 10% | 81% Math proficiency | 960 |
Compare the top 4 schools in Mercer Island side by side →
Other places in Washington
- Seattle(113)
- Tacoma(84)
- Spokane(82)
- Vancouver(77)
- Yakima(37)
- Everett(33)
- Renton(31)
- Puyallup(31)
- Auburn(30)
- Kennewick(30)
- Spokane Valley(29)
- Kent(29)
- Federal Way(28)
- Pasco(28)
- Bellevue(27)
- Bellingham(26)
- Bothell(22)
- Olympia(22)
- Marysville(22)
- Lacey(21)
- Lakewood(20)
- Redmond(19)
- Kirkland(18)
- Bremerton(18)
- Moses Lake(18)
- Port Orchard(16)
- Camas(16)
- Snohomish(16)
- Lynnwood(15)
- Richland(15)
- Longview(14)
- Issaquah(14)
- Shoreline(14)
- Shelton(13)
- Sammamish(13)
- Gig Harbor(13)
- Mount Vernon(12)
- Wenatchee(12)
- Spanaway(12)
- Lake Stevens(12)
- Woodinville(12)
- Walla Walla(12)
- Aberdeen(11)
- Silverdale(11)
- Kelso(10)
- Arlington(10)
- Edmonds(10)
- Port Angeles(9)
- Chehalis(9)
- Des Moines(9)
- Graham(9)
- East Wenatchee(9)
- Ferndale(9)
- Tumwater(9)
- Bonney Lake(9)
- Enumclaw(8)
- Battle Ground(8)
- Centralia(8)
- Ellensburg(8)
- SeaTac(8)
Free academic assessment
Is your child on grade level in reading and math?
Success Tutoring offers personalised English and math tutoring from Kindergarten to Grade 12. Start with a free online assessment and a clear plan for the year ahead.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Centres across NSW, VIC, QLD, WA, SA and ACT
Frequently asked questions
What is the best school in Mercer Island?
Island Park Elementary is the highest-ranked school in Mercer Island with a Success Index (US) of 89.7 out of 100 (Top 5% of elementary schools in United States).
How many schools are in Mercer Island?
Mercer Island has 6 schools (4 elementary, 1 high, 1 middle) educating 3,993 students in 2025.
What is the typical Enrollment in Mercer Island?
The median Enrollment across schools in Mercer Island is 431. Students enrolled in the latest NCES directory year.