City · Iowa · United States
Walnut, IA — ZIP codes
1 ZIP code · Pottawattamie County
- City
- Walnut
- County
- Pottawattamie
- State
- Iowa
- Country
- United States
- Postal code
- 51577Single source
- Coordinates
- 41.4623, -95.2180 View on OpenStreetMap
- Area code
- 712
ZIP codes (1)
| Postal code | Place name | Verification |
|---|---|---|
| 51577 | Walnut | Single source |
Sources and verification
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Last generated : 2026-08-21. Report an error.