Best Schools in Mercer Island, Washington
13 schools · 7 Elementary · 1 Middle · 3 High · 2 Other
Choosing a school in Mercer Island?
Use this page to compare every school in Mercer Island by level, neighborhood, and district — and find the right fit, not just the top of the list.
Shortlist starter
Start with these real page-level signals, then use the full table and map below.
Islander Middle School
Middle · Mercer Island School District. Ranked from real test data; compare it on the map and table below.
West Mercer Elementary
Elementary · Mercer Island School District. Ranked from real test data; compare it on the map and table below.
Lakeridge Elementary School
Elementary · Mercer Island School District. Ranked from real test data; compare it on the map and table below.
The short answer
The top-rated schools in Mercer Island for 2026 are Islander Middle School (8.6/10), West Mercer Elementary (8.5/10), and Lakeridge Elementary School (8.0/10), based on MySchoolScout's analysis of real test data across 6 rated schools. Ratings blend student growth, poverty-adjusted academic achievement, and school environment (plus college readiness for high schools), with equity shown as context, not scored; schools with estimated (proxy) scores are excluded from this ranking.
Schools
13
6 public · 7 private
Avg Score
7.3
out of 10
Median Home
$1,884,200
home value · ACS
District
1
serving the city
Schools
13
6 public · 7 private
Avg Score
7.3
out of 10
Median Home
$1,884,200
home value · ACS
District
1
serving the city
STAAR proficiency rose +8.7 points from 2022 to 2024. That's the biggest jump among Mercer Island schools across the two most recent comparable testing years.
Top-Rated Schools in Mercer Island
Ranked by MySchoolScout composite using only schools with real test data (6 rated schools; 13 schools in the directory). "Value" = points above what student poverty predicts. Estimated (proxy) scores are excluded.
| # | School | Rating |
|---|---|---|
| 1 | Islander Middle School | 8.6 / 10 |
| 2 | West Mercer Elementary | 8.5 / 10 |
| 3 | Lakeridge Elementary School | 8.0 / 10 |
| 4 | Mercer Island High School | 7.5 / 10 |
| 5 | Island Park Elementary | 6.5 / 10 |
| 6 | Northwood Elementary School | 5.1 / 10 |
See every school — including those with estimated data — in the full directory below. How we rate schools.
Family Snapshot
At a glance- Avg school rating
- 7.3/10
- Median household income
- $202,359
- Median home value
- $1,884,200
- Bachelor's degree or higher
- 79%
- Avg commute
- 25 min
- Owner-occupied homes
- 66%
55% of schools rated 7+
Census ACS, ZIPs in this city
Owner-occupied units
Adults 25+
Workers age 16+
Of occupied housing units
How Mercer Island compares
Washington rank
#19 of 193
cities by avg. school score
Vs. state average
+1.0
above Washington avg (6.3)
Median household income
$202k
227% of Washington median
Schools in this city
11
Mercer Island School District runs Mercer Island's public schools
6 public schools. Mercer Island School District is the only district on the page.
Every assigned public school in Mercer Island is a Mercer Island School District school (6 of 6).
Among 6 public schools with real test data, composite scores run from 5.1 to 8.6 — the spread is inside Mercer Island, not a citywide average.
About Schools in Mercer Island, Washington
Mercer Island, Washington is home to 13 schools, including 6 public schools and 7 private schools. The city's schools span 7 elementary schools, 1 middle school, and 3 high schools.
With an average rating of 7.3 out of 10, schools in Mercer Island perform strongly on the MySchoolScout composite scale. The composite blends student growth, poverty-adjusted academic achievement, and school environment — plus college readiness for high schools.
The highest-performing school in Mercer Island is Islander Middle School with a composite score of 8.6/10, demonstrating strong academic outcomes and school quality metrics.
Mercer Island is served by 1 school district: Mercer Island School District. These districts collectively serve 3,975 students.
Mercer Island's community shows 79% bachelor's degree attainment with a median household income of $202,359. The poverty rate in the area is 4.6%.
Browse the schools below to compare ratings, test scores, enrollment, and other key metrics. Use the filters to focus on specific school levels or types that match your family's needs.
Elementary Schools
7 schools| # | School | Rating | ||
|---|---|---|---|---|
| 1 | 410 students · Kindergarten–5th | 8.5 | ||
| 2 | 403 students · Kindergarten–5th | 8.0 | ||
| 3 | 361 students · Kindergarten–5th | 6.5 | ||
| 4 | 398 students · Pre-K–5th | 5.1 | ||
Private Schools3 schools Private and public school ratings use different data sources and scoring models. Scores are not directly comparable across school types. | ||||
| 1 | 312 students · Pre-K–8th | Not Rated | ||
| 2 | Creative Learning Center LlcPrivate 4 students · Pre-K–Kindergarten | Not Rated | ||
| 3 | Early World MontessoriPrivate 6 students · Pre-K–Kindergarten | Not Rated | ||
Middle Schools
1 school| # | School | Rating |
|---|---|---|
| 1 | 938 students · 6th–8th | 8.6 |
High Schools
3 schools| # | School | Rating | ||
|---|---|---|---|---|
| 1 | 1,465 students · 9th–12th | 7.5 | ||
Private Schools2 schools Private and public school ratings use different data sources and scoring models. Scores are not directly comparable across school types. | ||||
| 1 | 57 students · 9th–12th | Not Rated | ||
| 2 | Privett AcademyPrivate 74 students · 7th–12th | Not Rated | ||
Other Schools
2 schools| # | School | Rating |
|---|---|---|
| 1 | Yellow Wood AcademyPrivate 101 students · 4th–12th | Not Rated |
| 2 | St Monica SchoolPrivate 222 students · Pre-K–12th | Not Rated |
Schools in Mercer Island
Mercer Island, Washington · 13 schools
Community Demographics
Census ACS 2022 5-Year Estimates across 1 ZIP code
Median Income
$202,359
Median Home Value
$1,884,200
Median Rent
$2,464/mo
Population
25,282
College Educated
79%
Homeownership
66%
Avg Commute
25 min
Poverty Rate
4.6%
Community Profile
Mercer Island has a median household income of $202,359. It is a well-educated community where 79% of adults hold a bachelor's degree or higher. The median home value in the area is $1,884,200, with a median rent of $2,464/month. The local poverty rate of 4.6% is relatively low. The average commute for residents is 25 minutes. Source: U.S. Census ACS 2022 5-Year Estimates.
Schools by Level
- State
- Washington
- Elementary
- 7
- Middle
- 1
- High
- 3
- Other
- 2
Resources
School District
Other Major Cities in Washington
Top metros statewide by school count.
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 rateFrequently Asked Questions
Common questions about schools in Mercer Island, Washington
How many schools are in Mercer Island, Washington?
Mercer Island has 13 schools, including 6 public and 7 private schools spanning elementary, middle, and high school levels.
What is the average school rating in Mercer Island, Washington?
The average MySchoolScout composite score for schools in Mercer Island is 7.3 out of 10, built from student growth, poverty-adjusted academic achievement, and school environment — plus college readiness for high schools.
What is the top-ranked school in Mercer Island, Washington?
The top-ranked school in Mercer Island on MySchoolScout is Islander Middle School with a composite score of 8.6/10.
What is the best elementary school in Mercer Island, Washington?
The top-ranked elementary school in Mercer Island on MySchoolScout is West Mercer Elementary with a composite score of 8.5/10.
What is the best middle school in Mercer Island, Washington?
The top-ranked middle school in Mercer Island on MySchoolScout is Islander Middle School with a composite score of 8.6/10.
What is the best high school in Mercer Island, Washington?
The top-ranked high school in Mercer Island on MySchoolScout is Mercer Island High School with a composite score of 7.5/10.
How many school districts serve Mercer Island, Washington?
Mercer Island is served by 1 school district: Mercer Island School District.
What is the education level in Mercer Island, Washington?
According to Census data, 79% of adults in Mercer Island have earned a bachelor's degree or higher.
What is the median income in Mercer Island, Washington?
The median household income in Mercer Island is approximately $202,359 according to Census ACS 2022 estimates.
Are there private schools in Mercer Island, Washington?
Yes, Mercer Island has 7 private schools alongside 6 public schools. The top-rated private school is Yellow Wood Academy with a score of 8.1/10.
What is the student-teacher ratio in Mercer Island, Washington?
The average student-teacher ratio across schools in Mercer Island is 11.2:1. This ratio varies by school, so families should check individual school profiles for specific classroom sizes.
How does MySchoolScout rate schools in Mercer Island, Washington?
MySchoolScout rates schools using publicly available data from the NCES Common Core of Data and state education departments. Each school receives a 1-10 composite score built from Student Growth, Poverty-Adjusted Academic Achievement, and School Environment — plus College Readiness for high schools. Weights vary by school level, and equity data is shown for context but not scored.
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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.