Excellent
#174 of 2,228 schools in WA
Top 8% in state
Mercer Island High School
High School · Mercer Island School District
9100 SE 42nd, Mercer Island, WA 98040
Enrollment
1,465
Student-Teacher
19.8:1
Score
8.8
Grades
9th – 12th
Enrollment
1,465
Student-Teacher
19.8:1
Score
8.8
Grades
9th – 12th
Data vintage
2022-23
Data vintage2022-23
How this school compares
Washington schools
#174 of 2,228
In Mercer Island
#5 of 6
public schools
In district
#5 of 6
Mercer Island School District
Equity
9.6 / 10
Excellent
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Mercer Island High School
High School in Mercer Island · grades 9th – 12th. Start here, then compare fit against nearby and district options.
St Monica School
0.2 mi away. Use as a geographic alternative in the same move search.
Northwood Elementary School
0.2 mi away. Use as a geographic alternative in the same move search.
About Mercer Island High School
Mercer Island High School is a public high school in Mercer Island, WA, part of Mercer Island School District. Mercer Island High School serves approximately 1,465 students, and covers grades 9th-12th, and has a 19.8:1 student-teacher ratio. Mercer Island High School has a current MySchoolScout rating of 8.8 out of 10 and ranks #174 of 2,228 schools in WA.
Structured state assessment records for Mercer Island High School show 89% math proficiency (multi-year average, 2009-2024) and 94% reading/ELA proficiency (multi-year average, 2009-2024).
- This school 8.8 · Excellent
- WA avg 5.8
Score Breakdown
Full Profile · 4/4 metricsView breakdown
View breakdown
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Mercer Island High School — Students at Mercer Island High School score 79% proficient, which is above what's typical for similar communities (expected: 72%).
Equity & Diversity
Shown separately, not included in overall scoreFree/Reduced Lunch
7.2%
Students qualifying for federal meal assistance
Test Scores WA SBA (2023-24)
Based on 29 test records from WA state assessments. About our data
Proficiency Trend
→ StableAverage proficiency (% at or above grade level) across Math & ELA over time.
Source: EdFacts (NCES) and state assessment data. Growth score: 8.6/10.
How Mercer Island High School Compares
See how Mercer Island High School performs across key quality dimensions compared to state benchmarks.
Funding & Resources
Programs & Offerings
Data as of 2021-22 · Source: CRDC via Urban Institute · Learn more
Location
9100 SE 42nd, Mercer Island, WA 98040
Nearby Alternatives
Families considering Mercer Island High School may also want to explore other high schools in the area. Newport Senior High School (rated 8.6/10, 2.2 miles away, in nearby Bellevue), with a very similar rating. Another option is Bellevue High School (rated 8.4/10, 2.4 miles away, in nearby Bellevue), with a comparable rating. Additionally, NORTHWEST YESHIVA HIGH SCHOOL (rated 6.9/10, 1.0 miles away), a more accessible option. For more schools in Mercer Island, see our Mercer Island schools guide .
Nearby Schools
20 within 2.6 mi| School | Distance | Rating |
|---|---|---|
| ST MONICA SCHOOL Mercer Island | 0.2 mi | 6.7 |
| Northwood Elementary School Mercer Island | 0.2 mi | 9.2 |
| PRIVETT ACADEMY Mercer Island | 0.5 mi | — |
| YELLOW WOOD ACADEMY Mercer Island | 0.6 mi | 8.2 |
| West Mercer Elementary Mercer Island | 0.6 mi | 9.0 |
| FRENCH AMERICAN SCHOOL OF PUGET SOUND Mercer Island | 0.6 mi | 7.8 |
| NORTHWEST YESHIVA HIGH SCHOOL Mercer Island | 1.0 mi | 6.9 |
| EARLY WORLD MONTESSORI Mercer Island | 1.0 mi | — |
| Island Park Elementary Mercer Island | 1.3 mi | 9.7 |
| CREATIVE LEARNING CENTER LLC Mercer Island | 1.4 mi | — |
| Enatai Elementary School Bellevue | 1.5 mi | 7.3 |
| Islander Middle School Mercer Island | 2.4 mi | 8.2 |
| Bellevue High School Bellevue | 2.4 mi | 8.4 |
| Lakeridge Elementary School Mercer Island | 2.8 mi | 9.3 |
| Newport Heights Elementary Bellevue | 2.1 mi | 8.9 |
| Vera Risdon Middle School Newcastle | 2.7 mi | 6.5 |
| Medina Elementary School Medina | 3.2 mi | 9.1 |
| Newport Senior High School Bellevue | 2.2 mi | 8.6 |
| Hazelwood Elementary School Newcastle | 2.9 mi | 8.8 |
| Woodridge Elementary Bellevue | 2.6 mi | 8.8 |
Neighborhood Census ACS (2019-2023)
Census data for ZIP 98040 (ACS 2019-2023 5-Year Estimates) · Data sources
Median Income
$202,359
Median Home Value
$1,884,200
Median Rent
$2,464/mo
Population
25,282
College Educated
78.8%
Homeownership
66%
Avg Commute
24.9 min
Poverty Rate
4.6%
Median Age
45.8
Similar Schools
Schools in the same state with comparable level, size, and ratings
| School | Rating |
|---|---|
| Cleveland High School STEM Seattle, WA | 8.8 |
| Interlake Senior High School Bellevue, WA | 8.7 |
| Newport Senior High School Bellevue, WA | 8.6 |
| Bellevue High School Bellevue, WA | 8.4 |
| Bainbridge High School Bainbridge Island, WA | 8.2 |
| Ballard High School Seattle, WA | 8.2 |
Frequently Asked Questions
Common questions about Mercer Island High School
What grades does Mercer Island High School serve?
Mercer Island High School serves students in grades 9th through 12th.
How many students attend Mercer Island High School?
Mercer Island High School has an enrollment of approximately 1,465 students.
What is the student-teacher ratio at Mercer Island High School?
The student-teacher ratio at Mercer Island High School is 19.8:1. A lower ratio generally means more individual attention per student. The national average is approximately 16:1 for public schools.
How does Mercer Island High School rank in WA?
Mercer Island High School ranks #174 of 2,228 schools in WA.
What is Mercer Island High School's MySchoolScout rating?
Mercer Island High School has a current MySchoolScout rating of 8.8 out of 10. This score combines the level-appropriate components shown in the rating breakdown; equity data is shown separately for context.
What are the test scores at Mercer Island High School?
Based on loaded state assessment records, Mercer Island High School has 89% math proficiency (multi-year average, 2009-2024) and 94% reading/ELA proficiency (multi-year average, 2009-2024).
Is Mercer Island High School a charter school?
No, Mercer Island High School is not a charter school. It is a traditional public school operated by the local school district.
Is Mercer Island High School a Title I school?
No, Mercer Island High School is not currently a Title I school.
What does the Free & Reduced Lunch percentage mean for Mercer Island High School?
7.2% of students at Mercer Island High School qualify for free or reduced-price lunch. This is a commonly used indicator of economic need and provides important context when interpreting test scores.
Neighborhood Context
Powered by 
Quick Facts NCES CCD (SY 2022-23)
- Grades
- 9th – 12th
- Enrollment
- 1,465
- Student-Teacher Ratio
- 19.8:1
- Teachers (FTE)
- 74
- Free/Reduced Lunch
- 7.2%
- Type
- regular
- Setting
- Large Suburb
- County
- King County
- Chronic Absenteeism (SY 2022-23)
- 8.4%
- Phone
- (206) 236-3345
Resources & Links
District
Mercer Island School District- District Enrollment
- 3,975
- Schools in District
- 6
- Per-Pupil Spending
- $17,288
- District Rank
- #5 of 6
Other Schools in This District
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