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For the 2026 school year, there is 1 public high school serving 1,465 students in Mercer Island, WA. The top-ranked public high school in Mercer Island, WA is Mercer Island High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.

Mercer Island, WA public high school have an average math proficiency score of 81% (versus the Washington public high school average of 34%), and reading proficiency score of 94% (versus the 65% statewide average).

Mercer Island, WA public high school have a Graduation Rate of 94%, which is more than the Washington average of 84%.

The school with highest graduation rate is Mercer Island High School, with 94% graduation rate. Read more about public school graduation rate statistics in Washington or national school graduation rate statistics.

Minority enrollment is 47% of the student body (majority Asian), which is less than the Washington public high school average of 50% (majority Hispanic).