Johnson County, Iowa Zip Codes by Population (2024)

The most populated Zip Code in Johnson County, Iowa is 52240, located in Iowa City. * 2024 populations estimated based on the latest ACS 5-year data.

Zip Code
City
Population
52240Iowa City36,475
52241Coralville22,494
52246Iowa City22,340
52317North Liberty22,119
52245Iowa City22,088
52333Solon7,237
52247Kalona5,222
52340Tiffin5,192
52242Iowa City4,140
52338Swisher3,886
52755Lone Tree2,227
52322Oxford1,913
52235Hills889