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ZIP Code Database - Facts & Stats

Data Last Updated: February 1, 2023

ZIP Codes for City of Dayton, WA

Dayton, WA Covers 1 ZIP Code

ZIP CodeTypeCountyPopulation
ZIP Code 99328StandardColumbia3,733

Timezone(s):Pacific (GMT -08:00)
Population:2,526 (More Details)
Male Population:1,239
Female Population:1,287
Median Age:46
ZIP Codes:1
Area Codes:1
Total Area:874 square miles (county)
Land Area:869 square miles (county)
Water Area:5 square miles (county)

Dayton, WA Demographic Information *

Total population2,526
Male population1,239
Female population1,287
Median age (years)46.3
White Population2,315
Black Population9
Indian Population47
Asian Population15
Hawaiian Population14
Hispanic Population180
Median age (Male)45.4
Median age (Female)47.1
Total households1,082
Family households (families)670
Average household size2.27
Average family size2.85
Total housing units1,200
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  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],