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For the 2025-26 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).