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ZIP Code Database - Facts & Stats

Data Last Updated: May 1, 2023

ZIP Codes for City of Coulee Dam, WA

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Area Code(s):509
Timezone(s):Pacific (GMT -08:00)
City Population:1,098 (More Details)
Congressional District(s):04
Land Area:5,268 square miles (county)
Water Area:47 square miles (county)

1 ZIP Code

Coulee Dam, WA ZIP Code Boundaries

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Coulee Dam, WA Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases
99116Standard1,439100.00%MASON CITY

Coulee Dam, WA Demographic Information *

Total population**1,098
Male population548
Female population550
Median age (years)41.6
White Population604
Black Population5
Indian Population390
Asian Population8
Hawaiian Population0
Hispanic Population74
Median age (Male)41.1
Median age (Female)42.7
Total households459
Family households (families)301
Average household size2.39
Average family size2.93
Total housing units534
* Demographic data is based on 2010 Census for the City of COULEE DAM.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  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],