Mercer Island's Mercer Island High School is a Public School Serving students in Grades 09-12.
72.68% of students at this school are White, non-Hispanic
| Grades Offered | Grades 09-12 |
| Total Students | 1453 |
| Student:Teacher ratio | 23:1 |
| Gender % | 53.82 % Male / 46.18 % Female |
| Total Classroom Teachers | 63.92 |
| Student Population at Mercer Island High School by Grade | |
| Magnet School | |
| Charter School | |
| Shared School | |
| Title 1 Eligible |