Powder River County, MT ZIP codes
Powder River County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
ZIP codes partly in Powder River County
This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Powder River County.
- 59345 Powderville · mostly in Custer County
Map of Powder River County ZIP codes
The ZIP codes of Powder River County, 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.
Powder River County in numbers
About 1,815 people live in Powder River County, in 708 households, the 47th most populous of Montana's 56 counties. The median household income is $67,045 a year, 8% below the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $192,100 (49% below the Montana median), and median gross rent is $533 a month. The median age is 47.3; 26.1% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 19 minutes.
| Population | 1,815 |
|---|---|
| Households | 708 |
| Median age | 47.3 |
| Median household income | $67,045 |
| Median home value | $192,100 |
| Median gross rent | $533 |
| Bachelor's degree or higher | 26.1% |
| Mean commute | 19.4 min |
| Population density | 1 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Powder River County
| Town | ZIP codes | Population |
|---|---|---|
| Ashland | 1 | 959 |
| Broadus | 1 | 459 |
| Volborg | 1 | 202 |
| Otter | 1 | 51 |
| Biddle | 1 | 41 |
| Olive | 1 | 21 |
| Boyes | 1 | 15 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Powder River County.
Not sure you are in Powder River County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Powder River County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
59003 | Ashland , MT | Standard | 1,334 | $44,833 | $76,400 |
59062 | Otter , MT | Standard | 51 | $28,750 | — |
59314 | Biddle , MT | Standard | 155 | $91,875 | — |
59316 | Boyes , MT | Standard | 15 | $48,750 | — |
59317 | Broadus , MT | Standard | 1,108 | $71,250 | $197,400 |
59343 | Olive , MT | Standard | 21 | — | — |
59351 | Volborg , MT | Standard | 202 | — | $117,800 |
Cite this page
zipcodes.pro. “Powder River County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mt/county/powder-river
Underlying data is public domain or openly licensed — sources, vintages and licences.