Broadwater County, Montana ZIP codes
4 ZIP codes are in Broadwater County, plus 3 that cross in from neighboring counties. It's part of the Helena, MT metro area.
- ZIP codes
- 4
- Population in these ZIPs
- 5,412
- Avg. median income
- $65,600population-weighted
- Cities & towns
- 4
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Broadwater County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 59641 PO Box | Radersburg | — | — | — |
| 59643 | Toston | 867 | $49,831 | $478,000 |
| 59644 | Townsend | 4,187 | $68,811 | $448,800 |
| 59647 | Winston | 358 | — | $337,300 |
ZIP codes partly in Broadwater County
These ZIP codes are mostly in a neighboring county but cover part of Broadwater County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 59635 | East Helena | Lewis and Clark County | 8,292 | $83,740 | $434,600 |
| 59645 | White Sulphur Springs | Meagher County | 1,611 | $77,241 | $315,700 |
| 59752 | Three Forks | Gallatin County | 5,404 | $86,767 | $550,500 |
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 Broadwater County
Nearby counties
Frequently asked questions
How many ZIP codes are in Broadwater County, Montana?
4 ZIP codes are mainly in Broadwater County, and 3 more ZIP codes from neighboring areas reach partly into it.
What cities are in Broadwater County?
ZIP codes in Broadwater County use the city names Radersburg, Toston, Townsend and Winston.
What metro area is Broadwater County in?
Broadwater County is part of the Helena, MT metropolitan statistical area.