ZIP Code 51040
Onawa · Monona, Iowa
51040 is the ZIP code of Onawa in Monona, Iowa, United States.
- ZIP Code
- 51040
- County
- Monona
- State
- Iowa
- Country
- United States
Place with ZIP code 51040
| Place | County | Location |
|---|---|---|
| Onawa | Monona | 42.037, -96.107 |
Nearby ZIP codes
Frequently asked questions
Which places use ZIP code 51040?
Onawa.
Which county and state is 51040 in?
Monona, Iowa, United States.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.