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ZIP Code Database - Facts & Stats

Data Last Updated: December 1, 2022

ZIP Codes for City of Sammamish, WA

Sammamish, WA Covers 3 ZIP Codes

ZIP CodeTypeCountyPopulation
ZIP Code 98029StandardKing24,348
ZIP Code 98074StandardKing25,748
ZIP Code 98075StandardKing20,715

Timezone(s):Pacific (GMT -08:00)
Counties:KING, WA
Population:45,780 (More Details)
Male Population:22,921
Female Population:22,859
Median Age:38
ZIP Codes:3
Area Codes:2
Total Area:2,307 square miles (county)
Land Area:2,115 square miles (county)
Water Area:191 square miles (county)

Sammamish, WA Demographic Information *

Total population45,780
Male population22,921
Female population22,859
Median age (years)37.7
White Population34,207
Black Population439
Indian Population126
Asian Population8,852
Hawaiian Population47
Hispanic Population1,804
Median age (Male)37.6
Median age (Female)37.8
Total households15,154
Family households (families)12,918
Average household size3.01
Average family size3.28
Total housing units15,736
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 12/1/2022],
  2. Internal Data Creation [Last Updated: 12/1/2022],
  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],