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Mercer Island School District Schools
Mercer Island School District is a public school district in Washington, based in King County (Mercer Island). SchoolGrade grades 6 of its schools on actual versus projected test scores; every school below has its own page.
Mercer Island School District on the map
District boundary from the NCES EDGE composite school district file. Each marker is a graded school; click it for its grade and scores.
SchoolGrade summary for Mercer Island School District
6 of 6 schools in Mercer Island School District carry a SchoolGrade. Grade distribution:
A: 6
Best schools in Mercer Island School District
Statewide rankings: all 323 high schools in Washington · all 359 middle schools in Washington · all 1108 elementary schools in Washington
The ten highest SchoolGrades in the district. Grades reward actual test performance against the projection for each school's student context, so a B in a high-poverty school can outrank an A- elsewhere on impact.
- A+ Mercer Island High School (High school, greatly exceeds expectations)
- A+ Island Park Elementary (Elementary school, exceeds expectations)
- A+ Lakeridge Elementary School (Elementary school, meets expectations)
- A+ West Mercer Elementary (Elementary school, meets expectations)
- A+ Northwood Elementary School (Elementary school, meets expectations)
- A+ Islander Middle School (Middle school, meets expectations)
Every school in Mercer Island School District
High schools (1)
- A+ Mercer Island High School, Mercer Island
Middle and junior high schools (1)
- A+ Islander Middle School, Mercer Island
Elementary and primary schools (4)
- A+ Island Park Elementary, Mercer Island
- A+ Lakeridge Elementary School, Mercer Island
- A+ Northwood Elementary School, Mercer Island
- A+ West Mercer Elementary, Mercer Island
Where Mercer Island School District schools are
Cities and towns served (1)
- Mercer Island (6)
About this district
- State: Best schools in Washington
- County: King County
- Type: regular local school district
- Setting: large suburb (NCES locale of the district office)
- Enrollment: 3,975 students with 217 full-time-equivalent teachers and 426 total staff FTE (NCES CCD, 2023-24)
- NCES district ID: 5304980
- Grades are the 2025-26 SchoolGrade model: each school's actual proficiency against the level projected for its student context. How SchoolGrade works
Nearby school districts
- Bellevue School District (31 schools, 4 mi)
- Renton School District (29 schools, 6 mi)
- Tukwila School District (5 schools, 7 mi)
- Seattle School District No. 1 (106 schools, 7 mi)
- Lake Washington School District (56 schools, 9 mi)
- Highline School District (36 schools, 10 mi)
- Issaquah School District (29 schools, 10 mi)
- Kent School District (42 schools, 13 mi)
Questions about Mercer Island School District
How many schools are in Mercer Island School District?
SchoolGrade grades 6 public schools in Mercer Island School District, across 1 city or town. Every one of them is listed on this page with a link to its own report.
Which cities does Mercer Island School District serve?
The largest by graded schools: Mercer Island.
How good are the schools in Mercer Island School District?
Across the 6 graded schools, the average SchoolGrade is A+, with 84.3% of tested students meeting the state bar against a projected 72.8%. 100% of schools meet or exceed the expectation for their student context.
How many students attend Mercer Island School District?
3,975 students were enrolled in Mercer Island School District in the 2023-24 school year, about 18.3 students per full-time teacher (NCES Common Core of Data).
Where is Mercer Island School District?
Mercer Island School District is in Washington, based in King County, with its district office in Mercer Island. Its boundary covers about 6.4 sq mi.