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 2026-27 school year, there is 1 public middle school serving 960 students in Mercer Island School District. This district's average middle testing ranking is 10/10, which is in the top 1% of public middle schools in Washington.
Public Middle School in Mercer Island School District have an average math proficiency score of 74% (versus the Washington public middle school average of 37%), and reading proficiency score of 80% (versus the 51% statewide average).
The top-ranked public middle school in Mercer Island School District is Islander Middle 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 middle school average of 50% (majority Hispanic).

Overview

This School District
This State (WA)
# Schools
6 Schools
794 Schools
# Students
3,993 Students
302,552 Students
# Teachers
220 Teachers
15,929 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%)

Showing 2013–2023. Full 14-year historical data available below ↓

79%
41%

Showing 2012–2023. Full 14-year historical data available below ↓

85%
53%

Showing 2011–2022. Full 13-year historical data available below ↓

81%
49%
94%
83.8%

Showing 2012–2023. Full 13-year historical data available below ↓

(2022-23)
5.6%
34.7%

Students by Ethnicity:

0.67
0.68

Showing 2014–2023. Full 36-year historical data available below ↓

% American Indian
n/a
2%
% Asian
28%
8%

Showing 2014–2023. Full 36-year historical data available below ↓

% Hispanic
8%
25%

Showing 2014–2023. Full 35-year historical data available below ↓

% Black
1%
5%

Showing 2013–2023. Full 36-year historical data available below ↓

% White
48%
50%

Showing 2014–2023. Full 36-year historical data available below ↓

% Hawaiian
n/a
1%
% Two or more races
15%
9%

Showing 2014–2023. Full 13-year historical data available below ↓

All Ethnic Groups

District Revenue and Spending

The revenue/student of $22,329 is higher than the state median of $21,173. The school district revenue/student has grown by 7% over four school years.
The school district's spending/student of $21,028 is less than the state median of $21,108. The school district spending/student has stayed relatively flat over four school years.
This School District
This State (WA)
Total Revenue
$89 MM
$23,221 MM

Showing 2014–2023. Full 34-year historical data available below ↓

Spending
$84 MM
$23,150 MM

Showing 2014–2023. Full 34-year historical data available below ↓

Revenue / Student
$22,329
$21,173

Showing 2012–2023. Full 34-year historical data available below ↓

Spending / Student
$21,028
$21,108

Showing 2012–2023. Full 34-year historical data available below ↓

Best Mercer Island School District Public Middle Schools (2026-27)

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

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Quick Facts (26-27)

  • 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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