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For the 2026 school year, there are 5 public elementary schools serving 2,510 students in Mercer Island, WA. The top-ranked public elementary schools in Mercer Island, WA are Island Park Elementary School, Lakeridge Elementary School and West Mercer Elementary School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.

Mercer Island, WA public elementary schools have an average math proficiency score of 78% (versus the Washington public elementary school average of 43%), and reading proficiency score of 83% (versus the 51% statewide average). Elementary schools in Mercer Island have an average ranking of 10/10, which is in the top 1% of Washington public elementary schools.

Minority enrollment is 53% of the student body (majority Asian), which is more than the Washington public elementary school average of 52% (majority Hispanic).