Johnson County, Iowa ZIP Codes

13 ZIP Codes

Zip Code
City
Population ↓
52240Iowa City35,074
52241Coralville23,250
52317North Liberty23,097
52245Iowa City22,853
52246Iowa City22,308
52333Solon7,295
52340Tiffin6,128
52247Kalona5,914
52242Iowa City4,688
52338Swisher3,934
52322Oxford2,266
52755Lone Tree2,092
52235Hills974

Overview of ZIP Codes in Johnson County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
13
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 13 ZCTAs in Johnson County, Iowa (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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