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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

ZIP Codes for City of Washington, IA

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Area Code(s):319
Timezone(s):Central (GMT -06:00)
City Population:7,266 (More Details)
CBSA:Iowa City, IA
Congressional District(s):01
Land Area:569 square miles (county)
Water Area:2 square miles (county)

1 ZIP Code

Washington, IA ZIP Code Boundaries

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Washington, IA Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases
52353Standard9,173100.00%GRACE HILL

Washington, IA Demographic Information *

Total population**7,266
Male population3,497
Female population3,769
Median age (years)42.4
White Population6,718
Black Population103
Indian Population13
Asian Population39
Hawaiian Population11
Hispanic Population779
Median age (Male)39.5
Median age (Female)45.2
Total households3,048
Family households (families)1,861
Average household size2.31
Average family size2.93
Total housing units3,301
* Demographic data is based on 2010 Census for the City of WASHINGTON.
** 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],