每日吃瓜

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 6 public schools serving 3,975 students in Mercer Island School District.
Public Schools in Mercer Island School District have an average math proficiency score of 79% (versus the Washington public school average of 41%), and reading proficiency score of 85% (versus the 53% statewide average).
Minority enrollment is 51% of the student body (majority Asian), which is less than the Washington public school average of 52% (majority Hispanic).

Overview

This School District
This State (WA)
# Schools
6 Schools
2,561 Schools
# Students
3,975 Students
1,101,855 Students
# Teachers
217 Teachers
62,269 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:

0.66
0.69
% American Indian
n/a
1%
% Asian
28%
9%
% Hispanic
7%
26%
% Black
1%
5%
% White
49%
48%
% Hawaiian
n/a
2%
% Two or more races
15%
9%
All Ethnic Groups

District Revenue and Spending

The revenue/student of $20,484 is higher than the state median of $18,800. The school district revenue/student has grown by 13% over four school years.
The school district's spending/student of $18,521 is less than the state median of $19,251. 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
$20,484
$18,800
Spending / Student
$18,521
$19,251

Best Mercer Island School District Public 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 | 361 students Student-teacher ratio: 16:1 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 | 403 students Student-teacher ratio: 18:1 Minority enrollment: 55%
Rank: #33.
Mercer Island High School
(Math: 81% | Reading: 94%)
Rank:
10/
10
Top 5%
9100 Se 42nd
Mercer Island, WA 98040
(206) 236-3345
Gr: 9-12 | 1,465 student Student-teacher ratio: 20:1 Minority enrollment: 47%
Rank: #44.
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 | 410 students Student-teacher ratio: 16:1 Minority enrollment: 58%
Rank: #55.
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 | 938 students Student-teacher ratio: 20:1 Minority enrollment: 52%
Rank: #66.
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: 16:1 Minority enrollment: 59%

Frequently Asked Questions

How many schools belong to Mercer Island School District?
Mercer Island School District manages 6 public schools serving 3,975 students.
What is the rank of Mercer Island School District?
Mercer Island School District is ranked #1 out of 306 school districts in Washington (top 1%) based off of combined math and reading proficiency testing data for the 2022-2023 school year. This district ranks in the top 20% of Washington school districts for: Highest overall rank (Top 1%), Highest math proficiency (Top 1%), Highest reading/language arts proficiency (Top 1%), Highest science proficiency (Top 1%), Highest graduation rate (Top 5%) and Most diverse schools (Top 1%)
What is the racial composition of students in Mercer Island School District?
49% of Mercer Island School District students are White, 28% of students are Asian, 15% of students are Two or more races, 7% of students are Hispanic, and 1% of students are Black.
What is the student/teacher ratio of Mercer Island School District?
Mercer Island School District has a student/teacher ratio of 18:1, which is equal to the Washington state average of 18:1.
What is Mercer Island School District's spending/student ratio?
The school district's spending/student of $18,521 is less than the state median of $19,251. The school district spending/student has grown by 10% over four school years.

Recent Articles

Multilingual Learner Growth Models & Accountability
Multilingual Learner Growth Models & Accountability
Learn how multilingual learner growth models are reshaping school accountability systems and what it means for public schools in 2026.
School-Based Health Clinics: Funding, Billing, and Student Access
School-Based Health Clinics: Funding, Billing, and Student Access
Learn how school-based health clinics are funded, how billing works, and how students access care in public schools.
Outdoor Learning in Urban Schools: Forest School Programs
Outdoor Learning in Urban Schools: Forest School Programs
Explore how urban districts adopt outdoor learning and forest school programs to boost student engagement, well-being, and academic success.

Quick Facts (2026)

  • District size: 6 schools
  • Grades: PK-12
  • Enrollment: 3,975 students
  • Student-Teacher Ratio: 18:1
  • Minority Enrollment: 51%
  • : 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

Quick Links