Mercer Island School District

4160 86th Ave Se
Mercer Island, WA 98040-4196
(District boundaries shown in map)
10/
10
Top 1%

Top Rankings

Mercer Island School District ranks among the top 20% of public school district in Washington for:

Category
Attribute
Overall Rank
Highest overall rank (Top 1%)
Math Proficiency
Highest math proficiency (Top 1%)
Reading/Language Arts Proficiency
Highest reading/language arts proficiency (Top 1%)
Science Proficiency
Highest science proficiency (Top 1%)
Graduation Rate
Highest graduation rate (Top 5%)
Diversity
Most diverse schools (Top 1%)
For the 2026 school year, there are 5 public elementary schools serving 2,554 students in Mercer Island School District. This district's average elementary testing ranking is 10/10, which is in the top 1% of public elementary schools in Washington.
Public Elementary Schools in Mercer Island School District have an average math proficiency score of 78% (versus the Washington public elementary school average of 43%), and reading proficiency score of 83% (versus the 51% statewide average).
The top-ranked public elementary schools in Mercer Island School District are Island Park Elementary School, Lakeridge Elementary School and West Mercer Elementary School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking. Minority enrollment is 54% of the student body (majority Asian), which is more than the Washington public elementary school average of 53% (majority Hispanic).

Overview

This School District
This State (WA)
# Schools
6 Schools
1,832 Schools
# Students
3,993 Students
737,736 Students
# Teachers
220 Teachers
43,880 Teachers
Student-Teacher Ratio
18:1
18:1

Student By Grade

District Rank

Mercer Island School District, which is ranked within the top 1% of all 306 school districts in Washington (based off of combined math and reading proficiency testing data) for the 2022-2023 school year.
The school district's graduation rate of 94% has decreased from 95% over five school years.
This School District
State Average (WA)
#1 out of 307 school districts
(Top 1%)
79%
41%
85%
53%
81%
49%
94%
84%

Students by Ethnicity:

0.67
0.69
% American Indian
n/a
1%
% Asian
28%
9%
% Hispanic
8%
26%
% Black
1%
5%
% White
48%
48%
% Hawaiian
n/a
2%
% Two or more races
15%
9%
All Ethnic Groups

District Revenue and Spending

The revenue/student of $20,391 is higher than the state median of $18,891. The school district revenue/student has grown by 12% over four school years.
The school district's spending/student of $18,437 is less than the state median of $19,344. The school district spending/student has grown by 10% over four school years.
This School District
This State (WA)
Total Revenue
$81 MM
$20,715 MM
Spending
$74 MM
$21,212 MM
Revenue / Student
$20,391
$18,891
Spending / Student
$18,437
$19,344

Best Mercer Island School District Public Elementary Schools (2026)

School
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Island Park Elementary School
(Math: 85-89% | Reading: 90-94%)
Rank:
10/
10
Top 1%
5437 Island Crest Way
Mercer Island, WA 98040
(206) 236-3410
Gr: K-5 | 364 students Student-teacher ratio: 15:1 Minority enrollment: 44%
Rank: #22.
Lakeridge Elementary School
(Math: 87% | Reading: 88%)
Rank:
10/
10
Top 5%
8215 Se 78th
Mercer Island, WA 98040
(206) 236-3415
Gr: K-5 | 401 students Student-teacher ratio: 17:1 Minority enrollment: 56%
Rank: #33.
West Mercer Elementary School
(Math: 85% | Reading: 86%)
Rank:
10/
10
Top 5%
4141 81st Ave Se
Mercer Island, WA 98040
(206) 236-3430
Gr: K-5 | 431 students Student-teacher ratio: 17:1 Minority enrollment: 58%
Rank: #44.
Islander Middle School
(Math: 74% | Reading: 80%)
Rank:
10/
10
Top 5%
8225 Se 72nd
Mercer Island, WA 98040
(206) 236-3413
Gr: 6-8 | 960 students Student-teacher ratio: 21:1 Minority enrollment: 54%
Rank: #55.
Northwood Elementary School
(Math: 70-74% | Reading: 75-79%)
Rank:
10/
10
Top 10%
4030 86th Ave Se
Mercer Island, WA 98040
(253) 841-8740
Gr: PK-5 | 398 students Student-teacher ratio: 15:1 Minority enrollment: 54%

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Quick Facts (2026)

  • District size: 6 schools
  • Grades: PK-12
  • Enrollment: 3,993 students
  • Student-Teacher Ratio: 18:1
  • Minority Enrollment: 52%
  • : 94% (Top 5% in WA)
  • : Top 1%
  • : 79% (Top 1%)
  • : 85% (Top 1%)
  • : 81% (Top 1%)
  • Source: National Center for Education Statistics (NCES), WA Dept. of Education

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