| District Name | Mercer Island School District |
| State | Washington |
| County | King County |
| Statistical Area | Seattle-Tacoma-Bellevue, WA |
| Cities/Towns | Mercer Island |
| Total Students (2021) | 4192 |
| District Growth Rate (2017-21) | -6.7% |
| Majority Race/Ethnicty | White (57.6%) |
| Free/Reduced Lunch Program | 3.24% |