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ZIP Code Database - Facts & Stats

Data Last Updated: December 1, 2021

ZIP Codes for City of Mercer Island, WA

Mercer Island, WA Covers 1 ZIP Code

ZIP CodeTypeCountyPopulationArea Code(s)
ZIP Code 98040StandardKing22,699206

Timezone(s):Pacific (GMT -08:00)
Counties:KING, WA
Population:22,699 (More Details)
Male Population:11,046
Female Population:11,653
Median Age:46
ZIP Codes:1
Area Codes:1
Total Area:2,307 square miles (county)
Land Area:2,115 square miles (county)
Water Area:191 square miles (county)

Mercer Island, WA Demographic Information *

Total population22,699
Male population11,046
Female population11,653
Median age (years)46
White Population17,677
Black Population286
Indian Population51
Asian Population3,615
Hawaiian Population26
Hispanic Population634
Median age (Male)45
Median age (Female)46.8
Total households9,109
Family households (families)6,532
Average household size2.48
Average family size2.97
Total housing units9,930
* Demographic data is based on 2010 Census.

Mercer Island, WA Other Information

85 Cities within 30 miles of Mercer Island, WA Products


  1. U.S. Postal Service [Last Updated: 12/1/2021],
  2. Internal Data Creation [Last Updated: 12/1/2021],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],