River Sioux ZIP codes, Iowa
No ZIP code is named for River Sioux, IA; addresses there use a neighbouring town's name. The ZIP code covering it is 51545. Its area code is 712.
- USPS city name
- 0 ZIP codes
- Overlapping the city
- 1 more
- Population
- 7
- Area code
- 712
- County
- Harrison County
- State
- Iowa
NANPA lists no telephone rate centre for River Sioux itself, so these are the area codes of the nearest one, Little Sioux (0.0 miles). A town on an area-code boundary can differ from its neighbour.
ZIP codes covering River Sioux
These ZIP codes cover part of River Sioux but are addressed as somewhere else.
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
51545 | Little Sioux , IA | Standard | 267 | $70,313 | $80,000 |
Map of River Sioux ZIP codes
The ZIP codes of River Sioux, IA, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Towns near River Sioux
The nearest larger towns are Little Sioux (129 people, 1.1 mi), Mondamin (403 people, 6.5 mi) and Pisgah (255 people, 6.6 mi).
| Town | Population | Distance |
|---|---|---|
| Onawa | 2,839 | 15.6 mi |
| Missouri Valley | 2,666 | 18.4 mi |
| Blair, NE | 7,914 | 18.6 mi |
More nearby: every ZIP code in Harrison County · Iowa ZIP codes
Cite this page
zipcodes.pro. “River Sioux, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/river-sioux
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