ZIP Codes in La Porte City, IA
La Porte City uses 1 ZIP code, all in Black Hawk County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 1 La Porte City ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 50651 | standard | Black Hawk | 3,147 |
Finding a ZIP+4 in La Porte City
Knowing which of these 1 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 La Porte 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 La Porte City addresses and download it complete.