Mercer Island, Washington
| Officially Became a City | July 18, 1960 |
| Country | United States of America |
| State | Washington |
| County | King |
| City | Mercer Island |
| Library |
| Officially Became a City | July 18, 1960 |
| Country | United States of America |
| State | Washington |
| County | King |
| City | Mercer Island |
| Library |