Fallon County, Montana ZIP codes
3 ZIP codes are in Fallon County, plus 2 that cross in from neighboring counties.
- ZIP codes
- 3
- Population in these ZIPs
- 2,775
- Avg. median income
- $81,500population-weighted
- Cities & towns
- 3
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ZIP codes in Fallon County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 59313 | Baker | 2,111 | $78,015 | $191,500 |
| 59344 | Plevna | 406 | $110,455 | $193,100 |
| 59354 | Willard | 258 | $64,074 | — |
ZIP codes partly in Fallon County
These ZIP codes are mostly in a neighboring county but cover part of Fallon County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 59336 | Ismay | Custer County | 220 | $64,375 | $293,200 |
| 59353 | Wibaux | Wibaux County | 1,204 | $68,250 | $207,900 |
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 Fallon County
Nearby counties
Frequently asked questions
How many ZIP codes are in Fallon County, Montana?
3 ZIP codes are mainly in Fallon County, and 2 more ZIP codes from neighboring areas reach partly into it.
What cities are in Fallon County?
ZIP codes in Fallon County use the city names Baker, Plevna and Willard.