Big Horn County, Montana ZIP codes
11 ZIP codes are in Big Horn County, plus 7 that cross in from neighboring counties.
- ZIP codes
- 11
- Population in these ZIPs
- 11,997
- Avg. median income
- $58,300population-weighted
- Cities & towns
- 11
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Big Horn County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 59016 | Busby | 1,044 | $58,750 | $146,400 |
| 59022 | Crow Agency | 2,307 | $53,083 | $57,800 |
| 59025 | Decker | 53 | $36,500 | — |
| 59031 | Garryowen | 391 | — | $107,000 |
| 59034 | Hardin | 5,008 | $60,726 | $217,000 |
| 59035 | Fort Smith | 180 | $51,726 | $139,400 |
| 59050 | Lodge Grass | 1,338 | $62,500 | $171,900 |
| 59064 | Pompeys Pillar | 211 | — | $289,800 |
| 59066 | Pryor | 539 | $52,000 | $95,700 |
| 59075 | Saint Xavier | 125 | $24,063 | $211,600 |
| 59089 | Wyola | 801 | $62,870 | — |
ZIP codes partly in Big Horn County
These ZIP codes are mostly in a neighboring county but cover part of Big Horn County.
| ZIP code | City | State | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|---|
| 59010 | Bighorn | MT | Treasure County | 220 | $73,250 | $344,700 |
| 59024 | Custer | MT | Yellowstone County | 335 | $78,125 | $368,100 |
| 59037 | Huntley | MT | Yellowstone County | 2,336 | $105,099 | $498,100 |
| 59038 | Hysham | MT | Treasure County | 750 | $56,513 | $211,800 |
| 59043 | Lame Deer | MT | Rosebud County | 2,727 | $29,028 | $111,000 |
| 59101 | Billings | MT | Yellowstone County | 42,250 | $58,598 | $333,100 |
| 82801 | Sheridan | WY | Sheridan County | 26,310 | $73,213 | $429,800 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Big Horn County
Nearby counties
Frequently asked questions
How many ZIP codes are in Big Horn County, Montana?
11 ZIP codes are mainly in Big Horn County, and 7 more ZIP codes from neighboring areas reach partly into it.
What cities are in Big Horn County?
ZIP codes in Big Horn County use the city names Busby, Crow Agency, Decker, Fort Smith, Garryowen, Hardin, Lodge Grass, Pompeys Pillar, Pryor, Saint Xavier and Wyola.