Total enrollment
3,993
-199 (-5%) vs SY 2020-21
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 school.
4-year change in Mercer Island
SY 2020-21 vs SY 2024-25School count
6
0 (0%) vs SY 2020-21
Source: NCES Common Core of Data, enrollment-weighted demographic averages
Residents
25,307
all ages · ACS 5-yr
Students
3,993
public K-12 · NCES
Schools
6
public K-12
| 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 4 years. Total public-school enrollment in Mercer Island has shrank 5% since SY 2020-21, moving from about 4,192 students to 3,993.
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.