United States
51040 post code
Post code details
1 placeCode
Place
Onawa
Region
Iowa
County
Monona
Coordinates
42.037, -96.1072
Accuracy
4 / 6
Country
United States
Location
OpenStreetMap ↗
42.037, -96.1072© OpenStreetMap
Places under this code
1| Place | Region | County | Coordinates |
|---|---|---|---|
| Onawa | Iowa | Monona | 42.037, -96.1072 |
Same code in other countries
4FAQ
Which city is 51040 in?
Onawa, Iowa, United States.
What are the coordinates of 51040?
42.037, -96.1072
Is 51040 used in other countries?
Yes, 4 other countries.
The data is unofficial and has known truncation; verify with the recipient and carrier for critical shipments. See data source & license → · Updated 2026-11-09. Attribution in