51040 ZIP Code Onawa, Iowa – USA
The ZIP code 51040 is assigned to Onawa city, located in the Monona county that is part of the state of Iowa, IA, United States.
51040 zip code map
Postcode location
Onawa Iowa,IA
State of 51040
Check all the Iowa ZIP Code list.
US ZIP Codes
Please check all state’s postal code in the United States.