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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

ZIP Codes for City of Johnston, IA

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Counties:POLK, IA
Area Code(s):515
Timezone(s):Central (GMT -06:00)
City Population:17,278 (More Details)
CBSA:Des Moines-West Des Moines, IA
Congressional District(s):03
Land Area:574 square miles (county)
Water Area:18 square miles (county)

1 ZIP Code

Johnston, IA ZIP Code Boundaries

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Johnston, IA Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases
50131Standard17,499100.00%CAMP DODGE, URBANDALE

Johnston, IA Demographic Information *

Total population**17,278
Male population8,458
Female population8,820
Median age (years)36.9
White Population15,727
Black Population376
Indian Population13
Asian Population800
Hawaiian Population3
Hispanic Population350
Median age (Male)35.4
Median age (Female)38.1
Total households6,369
Family households (families)4,720
Average household size2.67
Average family size3.14
Total housing units6,618
* Demographic data is based on 2010 Census for the City of JOHNSTON.
** 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],