Total enrollment
3,993
-536 (-12%) vs SY 2017-18
6 schools in Mercer Island
Washington · Public K-12
Public K-12 education in Mercer Island runs across 6 schools, enrolling approximately 3,993 students, averaging 666 per campus.
7-year change in Mercer Island
SY 2017-18 vs SY 2024-25School count
6
0 (0%) vs SY 2017-18
% Hispanic
7%
was 5%
% Black
1%
was 1%
% Asian
28%
was 21%
Source: NCES Common Core of Data, enrollment-weighted demographic averages
| Name | Level | Grades | Enrollment |
|---|---|---|---|
| Island Park Elementary | Elementary | KG-05 | 364 |
| Islander Middle School | Middle | 06-08 | 960 |
| Lakeridge Elementary School | Elementary | KG-05 | 401 |
| Mercer Island High School | High | 09-12 | 1,439 |
| Northwood Elementary School | Elementary | PK-05 | 398 |
| West Mercer Elementary | Elementary | KG-05 | 431 |
About Mercer Island
Mercer Island is a middle-population Washington city in terms of public-school footprint, with 6 schools and 3,993 students total.
In terms of grade levels, the city spans 4 elementary, 1 middle, and 1 high.
Schools in Mercer Island average about 666 students each, 49% noticeably above the Washington norm.
Looking at the last 7 years. Total public-school enrollment in Mercer Island has shrank 12% since SY 2017-18, moving from about 4,529 students to 3,993. Demographically, the Asian share of enrollment increased from 21% to 28%.
In the discussion threads here, the community for Mercer Island discusses sports rivalries, cross-district programs, and shared facilities. Anyone with firsthand knowledge of these schools is welcome to weigh in.