ZIP Codes in Iowa City, IA
Iowa City uses 4 ZIP codes, all in Johnson County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 4 Iowa City ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 52240 | standard | Johnson | 35,074 |
| 52242 | standard | Johnson | 4,688 |
| 52245 | standard | Johnson | 22,853 |
| 52246 | standard | Johnson | 22,308 |
Finding a ZIP+4 in Iowa City
Knowing which of these 4 ZIP codes covers an address only gets you partway. The four-digit extension identifies the specific delivery point — typically one side of one block. Two houses facing each other on the same Iowa City street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
Upload a CSV of Iowa City addresses and download it complete.