For the 2025 school year, there are 6 public schools serving 3,975 students in Mercer Island, WA (there are 7 private schools, serving 1,073 private students). 79% of all K-12 students in Mercer Island, WA are educated in public schools (compared to the WA state average of 90%). Mercer Island has one of the highest concentrations of top ranked public schools in Washington.
The top ranked public schools in Mercer Island, WA are Island Park Elementary School, Mercer Island High School and Lakeridge Elementary School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Mercer Island, WA public schools have an average math proficiency score of 80% (versus the Washington public school average of 40%), and reading proficiency score of 85% (versus the 53% statewide average). Schools in Mercer Island have an average ranking of 10/10, which is in the top 1% of Washington public schools.
Minority enrollment is 51% of the student body (majority Asian), which is less than the Washington public school average of 52% (majority Hispanic).
Best Public Schools in Mercer Island, WA (2025)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Grades
Students
Rank: #11.
Island Park Elementary School
(Math: 85-89% | Reading: 90-94%)
Rank:
Rank:
10/
Top 1%10
5437 Island Crest Way
Mercer Island, WA 98040
(206) 236-3410
Mercer Island, WA 98040
(206) 236-3410
Grades: K-5
| 361 students
Rank: #22.
Mercer Island High School
(Math: 82% | Reading: 94%)
Rank:
Rank:
10/
Top 1%10
9100 Se 42nd
Mercer Island, WA 98040
(206) 236-3345
Mercer Island, WA 98040
(206) 236-3345
Grades: 9-12
| 1,465 students
Rank: #33.
Lakeridge Elementary School
(Math: 85% | Reading: 88%)
Rank:
Rank:
10/
Top 5%10
8215 Se 78th
Mercer Island, WA 98040
(206) 236-3415
Mercer Island, WA 98040
(206) 236-3415
Grades: K-5
| 403 students
Rank: #44.
West Mercer Elementary School
(Math: 83% | Reading: 86%)
Rank:
Rank:
10/
Top 5%10
4141 81st Ave Se
Mercer Island, WA 98040
(206) 236-3430
Mercer Island, WA 98040
(206) 236-3430
Grades: K-5
| 410 students
Rank: #55.
Islander Middle School
(Math: 76% | Reading: 80%)
Rank:
Rank:
10/
Top 5%10
8225 Se 72nd
Mercer Island, WA 98040
(206) 236-3413
Mercer Island, WA 98040
(206) 236-3413
Grades: 6-8
| 938 students
Rank: #66.
Northwood Elementary School
(Math: 75-79% | Reading: 75-79%)
Rank:
Rank:
10/
Top 10%10
4030 86th Ave Se
Mercer Island, WA 98040
(253) 841-8740
Mercer Island, WA 98040
(253) 841-8740
Grades: PK-5
| 398 students
Mercer Island, Washington Public Schools (Closed)
School
Location
Grades
Students
Children's Institute For Learning Differences (Closed 2023)
Special Education School
4030 86th Ave Se Suite F
Mercer Island, WA 98040
(253) 945-2084
Mercer Island, WA 98040
(253) 945-2084
Grades: PK-12
| 1 students
Eeu Special Education Elementary School (Closed 2023)
Special Education School
4160 86th Ave Se
Mercer Island, WA 98040
(206) 236-3325
Mercer Island, WA 98040
(206) 236-3325
Grades: PK-4
| 4 students
Frequently Asked Questions
What are the top ranked public schools in Mercer Island, WA?
The top ranked public schools in Mercer Island, WA include Island Park Elementary School, Mercer Island High School and Lakeridge Elementary School. Mercer Island has one of the highest concentrations of top ranked public schools in Washington.
How many public schools are located in Mercer Island?
6 public schools are located in Mercer Island.
What percentage of students in Mercer Island go to public school?
79% of all K-12 students in Mercer Island are educated in public schools (compared to the WA state average of 90%).
What is the racial composition of students in Mercer Island?
Mercer Island public schools minority enrollment is 51% of the student body (majority Asian), which is less than the Washington public schools average of 52% (majority Hispanic).
Which public schools in Mercer Island are often viewed compared to one another?
Popular comparisons of public schools in Mercer Island include: Northwood Elementary School vs. West Mercer Elementary School, West Mercer Elementary School vs. Northwood Elementary School, Lakeridge Elementary School vs. West Mercer Elementary School
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