Mercer Island High School at a glance
- National rank: #260 (2026-27 edition)
- Washington rank: #5
- Previous edition: Up from #368 in 2023-24
- Graduation rate: 97.2%
- Students: 1,439
Ranks are from the 2026-27 U.S. News & World Report Best High Schools edition. How HighSchoolTrends uses this data.