Islander Middle School
🇺🇸 Official data · 2025Mercer Island, Washington 98040 · Mercer Island School District
#6 of 363 middle schools in Washington
#911 of 15,369 nationally
About Islander Middle School
Islander Middle School is a public middle located in Mercer Island, in the Mercer Island School District school district of Washington, United States. It caters for Grades 6–8. In 2025 it enrolled 960 students. Traditional public schools run by a school district; free to attend.
Its Success Index (US) is 83.8 out of 100, placing it in the top 10% of middle schools in United States and 6th of 363 ranked middle schools in Washington. Its strongest component is community advantage (fewer free/reduced-price lunch) (98th percentile), and its weakest is students per teacher (9th percentile).
Other published figures: enrollment 960.
There are 6 schools in Mercer Island; Islander Middle School ranks 6th of 6 scored schools there.
Success Index (US) breakdown
Each component is a percentile against middle schools across United States.
- Math proficiency (30%)81%
- Reading proficiency (30%)84%
- Community advantage (fewer free/reduced-price lunch) (25%)7.8%
- Students per teacher (15%)21.3
The Success Index (US) summarises published data about a school community. It is not a measure of teaching quality. Read the methodology.
Published measures
All figures published for Islander Middle School by the official sources.
- Enrollment
- 960
- Students enrolled in the latest NCES directory year.
- Free/reduced-price lunch
- 7.8%
- Share of students eligible for free or reduced-price lunch.
- Students per teacher
- 21.3
- Enrollment divided by FTE teachers; not class size.
- Reading proficiency
- 84%
- Share of tested students proficient or above (all students, all grades).
- Math proficiency
- 81%
- Share of tested students proficient or above (all students, all grades).
Free academic assessment
Is your child on grade level in reading and math?
Success Tutoring offers personalised English and math tutoring from Kindergarten to Grade 12. Start with a free online assessment and a clear plan for the year ahead.
- Personalised learning plan mapped to the Australian Curriculum
- English & Maths from Kindergarten to Year 12
- Flexible memberships, no lock-in contracts
- Centres across NSW, VIC, QLD, WA, SA and ACT
Schools near Islander Middle School
Closest schools by straight-line distance, with their Success Index (US).
Lakeridge Elementary School
Mercer Island · Public elementary · Grades K–5
401 students · 568 m away
Island Park Elementary
Mercer Island · Public elementary · Grades K–5
364 students · 1.9 km away
Graham Hill Elementary School
Seattle · Public elementary · Grades PK–5
266 students · 3.1 km away
Rainier Beach High School
Seattle · Public high · Grades 9–12
854 students · 3.2 km away
Kennydale Elementary School
Renton · Public elementary · Grades K–5
511 students · 3.3 km away
Hazelwood Elementary School
Newcastle · Public elementary · Grades K–5
478 students · 3.3 km away
Vera Risdon Middle School
Newcastle · Public middle · Grades 6–8
751 students · 3.3 km away
Emerson Elementary School
Seattle · Public elementary · Grades PK–5
398 students · 3.4 km away
Middle College High School
Seattle · Public high · Grades 9–12
93 students · 3.4 km away
South Shore PK-8 School
Seattle · Public elementary · Grades PK–8
546 students · 3.6 km away
Similar schools
Public middle schools in Washington with a comparable Enrollment.
Olympic Middle School
Auburn · Public middle · Grades 6–8
956 students
Stevens Middle School
Pasco · Public middle · Grades 6–8
956 students
Cascade Middle School
Auburn · Public middle · Grades 6–8
966 students
Chinook Middle School
Kennewick · Public middle · Grades 6–8
950 students
Odle Middle School
Bellevue · Public middle · Grades 6–8
974 students
Hamilton International Middle School
Seattle · Public middle · Grades 6–8
983 students
Frequently asked questions
Is Islander Middle School a good school?
Islander Middle School has a Success Index (US) of 83.8 out of 100 (Top 10% of middle schools in United States) and ranks #6 of 363 in Washington. The index summarises published data about the school community and, where available, attainment; it does not measure teaching quality, so visit the school and ask about support at your child's level.
Where does Islander Middle School rank in Washington?
Islander Middle School ranks #6 of 363 middle schools in Washington and #911 of 15,369 nationally on the Success Index (US) (2025 data).
How many students attend Islander Middle School?
Islander Middle School had 960 students in 2025.
Is Islander Middle School a elementary school or a high school?
Islander Middle School is classified as a middle covering Grades 6–8. It is a public school.
What other schools are near Islander Middle School?
There are 10 schools within 15 km of Islander Middle School; they are listed on this page with their Success Index (US) and distance, and can be compared side by side.