Fallon County, MT ZIP codes
Fallon 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 Fallon County
This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Fallon County.
- 59336 Ismay · mostly in Custer County
Map of Fallon County ZIP codes
The ZIP codes of Fallon 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.
Fallon County in numbers
About 2,760 people live in Fallon County, in 1,178 households, the 42nd most populous of Montana's 56 counties. The median household income is $76,250 a year, 5% above the Montana median of $72,509 (US: $80,734). The median owner-occupied home is valued at $244,800 (35% below the Montana median), and median gross rent is $779 a month. The median age is 37.5; 16.2% of adults 25 and over hold a bachelor's degree or higher (35.2% across Montana); the average commute takes 21 minutes.
| Population | 2,760 |
|---|---|
| Households | 1,178 |
| Median age | 37.5 |
| Median household income | $76,250 |
| Median home value | $244,800 |
| Median gross rent | $779 |
| Bachelor's degree or higher | 16.2% |
| Mean commute | 21.0 min |
| Population density | 2 / 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 Fallon County
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 Fallon County.
Not sure you are in Fallon County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Fallon County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
59313 | Baker , MT | Standard | 2,111 | $78,015 | $231,800 |
59344 | Plevna , MT | Standard | 406 | $110,455 | $287,500 |
59354 | Willard , MT | Standard | 258 | $64,074 | — |
Cite this page
zipcodes.pro. “Fallon County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mt/county/fallon
Underlying data is public domain or openly licensed — sources, vintages and licences.