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 10%)
Diversity
Most diverse schools (Top 1%)
For the 2025 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 80% (versus the Washington public school average of 40%), 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
2,565 Schools
# Students
3,975 Students
1,102,128 Students
# Teachers
217 Teachers
62,276 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 2021-2022 school year.
The school district's graduation rate of 92% has decreased from 94% over five school years.
Overall District Rank
#1 out of 307 school districts
(Top 1%)
(Top 1%)
Math Test Scores (% Proficient)
80%
40%
Reading/Language Arts Test Scores (% Proficient)
85%
53%
Science Test Scores (% Proficient)
81%
49%
Graduation Rate
92%
84%
Students by Ethnicity:
Diversity Score
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 $18,796. 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 $19,246. The school district spending/student has grown by 5% over four school years.
Total Revenue
$81 MM
$20,715 MM
Spending
$74 MM
$21,212 MM
Revenue / Student
$20,484
$18,796
Spending / Student
$18,521
$19,246
Best Mercer Island School District Public Schools (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
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 2021-2022 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 10%) 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 $19,246. The school district spending/student has grown by 5% over four school years.
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