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.
Overall District Rank
#1 out of 307 school districts
(Top 1%)
(Top 1%)
Math Test Scores (% Proficient)
79%
41%
Reading/Language Arts Test Scores (% Proficient)
85%
53%
Science Test Scores (% Proficient)
81%
49%
Graduation Rate
94%
84%
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