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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 2025-26 school year, there is 1 public high school serving 1,465 students in Mercer Island School District.
Public High School in Mercer Island School District have an average math proficiency score of 81% (versus the Washington public high school average of 34%), and reading proficiency score of 94% (versus the 65% statewide average).
Public High School in Mercer Island School District have a Graduation Rate of 94%, which is more than the Washington average of 84%.
The school with highest graduation rate is Mercer Island High School, with 94% graduation rate. Read more about public school graduation rate statistics in Washington or national school graduation rate statistics.
Minority enrollment is 47% of the student body (majority Asian), which is less than the Washington public high school average of 50% (majority Hispanic).

Overview

This School District
This State (WA)
# Schools
6 Schools
859 Schools
# Students
3,975 Students
392,562 Students
# Teachers
217 Teachers
19,037 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
0.68
% American Indian
n/a
2%
% Asian
28%
8%
% Hispanic
7%
26%
% Black
1%
5%
% White
49%
50%
% Hawaiian
n/a
1%
% Two or more races
15%
8%
All Ethnic Groups

District Revenue and Spending

The revenue/student of $20,484 is higher than the state median of $18,796. The school district revenue/student has grown by 5% over four school years.
The school district's spending/student of $18,521 is less than the state median of $19,247. The school district spending/student has grown by 5% 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
$18,796
Spending / Student
$18,521
$19,247

Best Mercer Island School District Public High Schools (2025-26)

School
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
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%

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Quick Facts (2025-26)

  • 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

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