ZIP Code 51040 – Onawa, Iowa | ZipsCode.us
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ZIP Code 51040
Onawa, Iowa · Monona
ZIP code 51040 belongs to the city of Onawa in Iowa (Monona). See all Iowa ZIP Codes.
ZIP code 51040 belongs to Onawa, Iowa, in Monona. If you are mailing a letter or package to this area, use Onawa, IA 51040 in the address. On this page you will find the city and county for 51040, nearby ZIP codes in the same county, and free tools to look up any address in this ZIP code.
What City Is ZIP Code 51040?
The city for ZIP code 51040 is Onawa, Iowa. When you write an address in this area, the correct format is: Name, Street Address, Onawa, IA 51040.
ZIP Code 51040 County and State
ZIP code 51040 is located in Monona, Iowa. For a complete list of cities and ZIP codes across the state, see the Iowa ZIP Codes page.
Nearby ZIP Codes in Monona
These ZIP codes are in the same county as 51040:
ZIP Code 51040 on the Map
The map below shows the approximate center of ZIP code 51040, near Onawa, Iowa. You can zoom in and drag the map to explore the area.
Map center is approximate (ZIP area center, around 42.037, -96.1072). Map data © OpenStreetMap.
Population and Demographics of ZIP Code 51040
According to public U.S. Census Bureau data, ZIP code 51040 is home to a community in Iowa. The figures below come from the U.S. Census and the American Community Survey (ACS).
Source: U.S. Census Bureau, American Community Survey (ACS) 2023 5-year estimates and 2023 Gazetteer. Figures are estimates and change with each new survey.
Find an Address in ZIP Code 51040
Need the full ZIP+4 code for a specific street address in Onawa? Use the free ZIP+4 Lookup tool, or find any ZIP code from a street address with the ZIP Code by Address tool.
Frequently Asked Questions
What city is ZIP code 51040?
ZIP code 51040 is for Onawa, Iowa.
What county is ZIP code 51040 in?
ZIP code 51040 is in Monona, Iowa.
What state is ZIP code 51040 in?
ZIP code 51040 is in Iowa (IA).
How do I find the ZIP+4 for an address in 51040?
Use the free ZIP+4 Lookup tool with the full street address to get the complete 9-digit ZIP code.
What are the nearby ZIP codes to 51040?
Nearby ZIP codes include 51010 (Castana), 51034 (Mapleton), 51051 (Rodney), 51060 (Ute), 51063 (Whiting).
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