Population of Mercer Island, Washington as of May 2025. How many people live in Mercer Island today?

The exact population of Mercer Island, Washington as of May 2025 is estimated at 24,748 residents. Please note: this figure is an estimate and may slightly change as people get born and pass away, it also depends on migration to/from Mercer Island.

Check out more data on population in Washington:

• Population of Tacoma
• Population of Everett
• Population of Spokane Valley
• Population of Bellingham
• Population of Pasco
• Population of Marysville
• Population of Lakewood
• Population of Lacey
• Population of Issaquah
• Population of University Place
• Population of Graham
• Population of Maple Valley
• Population of Kenmore
• Population of Silver Firs
• Population of Tukwila
• Population of Covington
• Population of Fairwood