Rocky Boy's Agency ZIP codes, Montana
No ZIP code is named for Rocky Boy's Agency, MT; addresses there use a neighbouring town's name. The ZIP code covering it is 59521. Its area code is 406.
- USPS city name
- 0 ZIP codes
- Overlapping the city
- 1 more
- Population
- 120
- Area code
- 406
- County
- Hill County
- State
- Montana
NANPA lists no telephone rate centre for Rocky Boy's Agency itself, so these are the area codes of the nearest one, Box Elder (0.0 miles). A town on an area-code boundary can differ from its neighbour.
ZIP codes covering Rocky Boy's Agency
These ZIP codes cover part of Rocky Boy's Agency but are addressed as somewhere else.
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
59521 | Box Elder , MT | Standard | 3,529 | $50,288 | $103,700 |
Map of Rocky Boy's Agency ZIP codes
The ZIP codes of Rocky Boy's Agency, MT, 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 Rocky Boy's Agency
The nearest larger towns are Parker School (307 people, 2.1 mi), St. Pierre (394 people, 2.2 mi) and Sangrey (339 people, 2.4 mi).
| Town | Population | Distance |
|---|---|---|
| Havre | 9,258 | 19.9 mi |
More nearby: every ZIP code in Hill County · Montana ZIP codes
Cite this page
zipcodes.pro. “Rocky Boy's Agency, MT ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mt/rocky-boy-s-agency
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