Musselshell County, Montana ZIP codes
3 ZIP codes are in Musselshell County, plus 3 that cross in from neighboring counties.
- ZIP codes
- 3
- Population in these ZIPs
- 4,849
- Avg. median income
- $58,900population-weighted
- Cities & towns
- 2
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ZIP codes in Musselshell County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 59059 | Musselshell | 159 | $39,519 | $211,800 |
| 59072 | Roundup | 4,690 | $59,594 | $229,200 |
| 59073 PO Box | Roundup | — | — | — |
ZIP codes partly in Musselshell County
These ZIP codes are mostly in a neighboring county but cover part of Musselshell County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 59015 | Broadview | Yellowstone County | 394 | $69,583 | $375,000 |
| 59046 | Lavina | Golden Valley County | 577 | $74,000 | $287,200 |
| 59054 | Melstone | Rosebud County | 227 | $54,250 | $218,400 |
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 Musselshell County
Nearby counties
Frequently asked questions
How many ZIP codes are in Musselshell County, Montana?
3 ZIP codes are mainly in Musselshell County, and 3 more ZIP codes from neighboring areas reach partly into it.
What cities are in Musselshell County?
ZIP codes in Musselshell County use the city names Musselshell and Roundup.