SchoolRow
#13

Islander Middle School

Mercer Island, WA · Mercer Island School District · Grades 6-8

13th of 381 Washington middle schools statewide · better than 97%· Stable

938
Students
2023–24 enrollment
20.8:1
Student / teacher ratio
8%
Free / reduced-price lunch
low-income indicator
8.2%
Chronically absent
WA average 27%

Islander Middle School ranking

SchoolRow ranks Islander Middle School 13th of 381 Washington middle schools for 2024–25, based on WA Smarter Balanced / WCAS 2024–25 English and Math results — better than 97% of middle schools statewide. Its statewide percentile went from 98th in 2019 to 97th in 2025.

Statewide percentile by year
25%50%75%97%201920202025no testing 2020–21

Islander Middle School test scores

Percent meeting or exceeding the state standard, WA Smarter Balanced / WCAS 2024–25 · 941 students tested

English Language Arts
This school
80%
WA average
51%
Math
This school
76%
WA average
41%
Science
This school
73%
WA average
43%
English Language Arts over time this school WA average
25%50%75%80%51%201920202025no testing 2020–21
Math over time this school WA average
25%50%75%76%41%201920202025no testing 2020–21

Islander Middle School students

Racial and ethnic breakdown of 938 students (202324, NCES) — and how it has shifted since 2013

8%White48%Asian30%Two+13%
Hover the pie for details
Hispanic 8%White 48%Asian 30%Two or more races 13%71%19%20132023
GroupTrend20132023Change
White71.3%48.1% 23.2 pts
Asian19.1%29.7% 10.6 pts
Two or more races4.0%13.2% 9.2 pts
Hispanic4.1%8.0% 3.9 pts
Black0.8%0.5% 0.3 pts

Homes near Islander Middle School

Typical home value $2.32M in zip 98040 as of 2026-05 · trend since 2000

$663K$1.33M$1.99M$2.65M$2.36M200020052010201520202025

Data Provided by Zillow Group

See recently sold homes in 98040 on Zillow →

Middle schools near Islander Middle School

Closest same-level schools, with 2024–25 state rank

View on the map →

Frequently asked questions

What school district is Islander Middle School in?

Islander Middle School is part of the Mercer Island School District district in Mercer Island, Washington.

Is Islander Middle School a good school?

SchoolRow ranks Islander Middle School 13th of 381 Washington middle schools (better than 97% statewide) based on 2024–25 test results (WA Smarter Balanced / WCAS 2024–25).

What is the racial makeup of Islander Middle School?

White 48%, Asian 30%, Two or more races 13%, Hispanic 8% (938 students, 2023–24).

How much do homes near Islander Middle School cost?

The typical home value in zip code 98040 is $2.32M as of 2026-05 (Zillow ZHVI).

Sources: state education department data (WA Smarter Balanced / WCAS 2024–25, low-income, chronic absenteeism), National Center for Education Statistics via the Urban Institute (enrollment, demographics, staffing), Zillow Group (home values). Rankings are computed by SchoolRow from state English and Math results within grade level; they measure test performance, not everything that makes a school good.