For the 2026 school year, there is 1 public high school serving 1,439 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 48% of the student body (majority Asian), which is less than the Washington public high school average of 51% (majority Hispanic).
Best Public High Schools in Mercer Island, WA (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Mercer Island High School
(Math: 81% | Reading: 94%)
Rank:
Rank:
10/
Top 5%10
9100 Se 42nd
Mercer Island, WA 98040
(206) 236-3345
Mercer Island, WA 98040
(206) 236-3345
Gr: 9-12 | 1,439 students Student-teacher ratio: 19:1 Minority enrollment: 48%
Frequently Asked Questions
What are the top-ranked public high schools in Mercer Island, WA?
The top-ranked public high schools in Mercer Island, WA include Mercer Island High School. Mercer Island has one of the highest concentrations of top-ranked public schools in Washington.
How many public high schools are located in Mercer Island?
1 public high schools are located in Mercer Island.
What is the racial composition of students in Mercer Island?
Mercer Island public high schools minority enrollment is 48% of the student body (majority Asian), which is less than the Washington public high schools average of 51% (majority Hispanic).
Recent Articles
AI Report Cards: Should Schools Evaluate AI Use?
Explore whether schools should assess student AI use, the benefits, risks, and what responsible AI report cards could look like in 2026.
The Parent’s Guide to School Cell Phone Bans in 2026
Learn how school cell phone bans work in 2026, why districts are adopting them, and what parents should expect.
Parental Involvement in Public Schools: 2026 Update
Explore the latest 2026 trends, research, and strategies shaping parental involvement in public schools and student success.