Mercer Island School District
School District · Mercer Island, Washington
Avg Rating
9.0
out of 10
Schools
6
4 elem, 1 mid, 1 high
Per-Pupil Spending
$17,288
Student-Teacher Ratio
18.3:1
Avg Rating
9.0
out of 10
Schools
6
4 elem, 1 mid, 1 high
Per-Pupil Spending
$17,288
Student-Teacher Ratio
18.3:1
Evaluating Mercer Island School District?
A district shares budget, policy, and attendance zones across its schools — use this page to judge Mercer Island School District as a whole, then compare how its individual schools differ.
Shortlist starter
Start with these real page-level signals, then use the full table and map below.
Island Park Elementary
Mercer Island · Elementary. Compare this profile against district averages, level fit, and attendance-zone reality below.
Lakeridge Elementary School
Mercer Island · Elementary. Compare this profile against district averages, level fit, and attendance-zone reality below.
Northwood Elementary School
Mercer Island · Elementary. Compare this profile against district averages, level fit, and attendance-zone reality below.
How this district compares
Washington rank
#1 of 233
districts by avg. composite
Vs. state average
+2.7
above Washington avg
Per-pupil spending
$17,288
$436 vs Washington median
District size
3,975 students
Much larger than Washington median
The short answer
Mercer Island School District ranks #1 of 233 Washington districts by overall school rating. Mercer Island School District's schools with real test data average 9.0/10 across 6 schools. Its top-rated schools are Island Park Elementary (9.7/10), Lakeridge Elementary School (9.3/10), and Northwood Elementary School (9.2/10). Schools with estimated (proxy) scores are excluded from this ranking.
STAAR proficiency rose +7.3 points from 2022 to 2024. That's the biggest jump among Mercer Island School District schools across the two most recent comparable testing years.
Top-Rated Schools in Mercer Island School District
Ranked by MySchoolScout composite rating using only schools with real test data (6 of 6). "Value" = points above what student poverty predicts. Estimated (proxy) scores are excluded.
| # | School | Rating |
|---|---|---|
| 1 | Island Park Elementary | 9.7 / 10 |
| 2 | Lakeridge Elementary School | 9.3 / 10 |
| 3 | Northwood Elementary School | 9.2 / 10 |
| 4 | West Mercer Elementary | 9.0 / 10 |
| 5 | Mercer Island High School | 8.8 / 10 |
| 6 | Islander Middle School | 8.2 / 10 |
See all 6 schools — including those with estimated data — in the full directory below. How we rate schools.
About Mercer Island School District
Mercer Island School District is a Mercer Island, Washington school district serving 6 schools. The district educates 3,975 students with a student-teacher ratio of 18.3:1. The district invests $17,288 per student annually.
With an average rating of 9.0/10, Mercer Island School District is among the strongest-performing districts in the state.
The highest-rated school in the district is Island Park Elementary, which has a composite score of 9.7/10.
In standardized testing, Mercer Island School District students show an average math proficiency of 84.0% and ELA proficiency of 87.1%.
The district includes 4 elementary schools , 1 middle school , and 1 high school.
District Map
Schools in Mercer Island School District, colored by MySchoolScout rank. Click a pin for details.
District Average Test Scores
Average proficiency across all schools in Mercer Island School District with test data.
Schools in Mercer Island School District
6 schools Elementary Schools 4
Middle Schools 1
High Schools 1
District Details
- State
- Washington
- City
- Mercer Island
- Total Enrollment
- 3,975
- Teachers (FTE)
- 217
- Child Poverty Rate
- 0.0%
- Data Year
- 2023
Frequently Asked Questions
How many schools are in Mercer Island School District?
Mercer Island School District has 6 schools in total — 4 elementary, 1 middle, and 1 high schools. You can explore each school's ratings and details on this page.
What is the average rating for Mercer Island School District?
The average composite rating for Mercer Island School District is 9.0/10. This score is calculated from the individual ratings of all schools with academic data in the district.
What is the per-pupil spending in Mercer Island School District?
Mercer Island School District spends $17,288 per student per year.
What is the student-teacher ratio in Mercer Island School District?
The average student-teacher ratio in Mercer Island School District is 18.3:1.
What is the top-rated school in Mercer Island School District?
Island Park Elementary is the highest-rated school in Mercer Island School District with a composite score of 9.7/10.
What are the test scores in Mercer Island School District?
Across schools in Mercer Island School District with test data, the average math proficiency is 84.0% and the average ELA (reading/writing) proficiency is 87.1%. These figures represent the percentage of students meeting or exceeding grade-level standards.
How does Mercer Island School District compare to other districts in Washington?
Mercer Island School District has an average school rating of 9.0/10 across 6 schools. Families can compare this to other districts in Washington by visiting individual district pages. Factors like school size, available programs, and community demographics also play a role in choosing the right fit.
How does MySchoolScout rate schools?
MySchoolScout ratings blend student growth, poverty-adjusted academic performance, and learning environment — plus college readiness for high schools. Weights vary by school level, and equity data is shown for context without being factored into the score. Learn more about our rating system on our methodology page.
District Averages
- Overall Rating
- 9.0/10
- Math Proficiency
- 84.0%
- ELA Proficiency
- 87.1%
Resources
How we rate schools
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateOther School Districts in WA
Compare Mercer Island School District with neighboring districts in the state.
- Seattle School District No. 1 (109)
- Spokane School District (69)
- Tacoma School District (69)
- Lake Washington School District (57)
- Federal Way School District (46)
- Kent School District (46)
- Vancouver School District (45)
- Highline School District (43)
- Northshore School District (40)
- Bethel School District (39)
- Evergreen School District (clark) (39)
- Edmonds School District (38)
- Puyallup School District (37)
- Clover Park School District (33)
- Everett School District (33)
- Kennewick School District (33)
- Central Valley School District (32)
- Renton School District (31)
- Bellevue School District (30)
- Issaquah School District (30)
- Pasco School District (29)
- Yakima School District (29)
- Auburn School District (26)
- Bellingham School District (25)
Data from NCES Common Core of Data, Washington Dept. of Education, and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.
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