District Contact & Information
Source: NCES CCD 2024–25Schools in Mercer Island School District
6 schools listed| School | Level | Grades | Students | City |
|---|---|---|---|---|
| Island Park Elementary | Elementary | Kindergarten – 5th | 364 | Mercer Island |
| Lakeridge Elementary School | Elementary | Kindergarten – 5th | 401 | Mercer Island |
| Northwood Elementary School | Elementary | Pre-K – 5th | 398 | Mercer Island |
| West Mercer Elementary | Elementary | Kindergarten – 5th | 431 | Mercer Island |
| Islander Middle School | Middle | 6th – 8th | 960 | Mercer Island |
| Mercer Island High School | High | 9th – 12th | 1,439 | Mercer Island |
Zip Codes Served by Mercer Island School District
1 zip code| Zip Code | City | County | State |
|---|---|---|---|
| 98040 | Mercer Island | King County | WA |
Frequently Asked Questions
About Mercer Island School District
Mercer Island School District is a public school district serving 1 zip code in Washington, primarily in King County. It carries an overall rating of 10/10 (Excellent), the 99th percentile among Washington districts. That rating reflects the share of students proficient in reading and math on state assessments (SBAC 2024–25) and is ranked only against other Washington districts — scores are not comparable between states. Directory details on this page come from the NCES Common Core of Data, 2024–25.
Schools in this district
NCES lists 6 schools operating under Mercer Island School District — 4 elementary, 1 middle and 1 high. The largest by enrollment is Mercer Island High School with 1,439 students. School-level enrollment comes from the NCES Common Core of Data school directory; a school with no reported enrollment is shown with a dash rather than a zero.
Checking your own address
District boundaries are address-specific and do not follow zip code lines exactly — a single zip code can be split between two or more districts. Use the zip codes listed above as a starting point, then confirm your assignment with the district office at (206)236-3300 before making a housing decision.