| ZIP Codes: | 6 ZIP Codes (4 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Code: | 406 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 11:54:11 PM |
| Population: | 13,276 [See All] |
| FIPS: | 30043 |
| CBSA: | Helena, MT |
| Land Area: | 1,586 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 46.1531, -112.1007 |
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13,276 residents live across 6 ZIPs covering 1,586 sq mi, served by 6 distinct USPS-recognized cities.
Population moved from 11,905 to 13,276 from 2014 to 2024 — a +11.5% change. 4 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 59634 (Clancy, $129,891 median) and poorest ZIP 59759 (Whitehall, $60,571) are 43.9 miles apart — a 2.1× income gap across local geography.
Median home values vary 3.4× across this county — from $235,700 in 59631 (Basin) to $790,300 in 59721 (Cardwell).
Density varies 14× across the county — from 2 people/sq mi in 59721 (Cardwell) to 27 in 59634 (Clancy).
Educational attainment ranges from 17.4% bachelor's+ in 59759 (Whitehall) to 46.8% in 59634 (Clancy) — the breadth of educational profiles across the area.
Within Montana, this is the #14 most populous of 56 counties and ranks #2 for median household income with the #13 fastest decade growth .
Weighted by population, the typical household earns about $96,902 across the county — reflecting what a typical resident sees, not a simple ZIP average.
31.9% of adults age 25+ hold a bachelor's degree or higher (3,132 of 9,825 reporting).
4 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 59634 | Clancy | Standard | 5,521 | $129,891 | 201.9 | 16.7% |
| 59759 | Whitehall | Standard | 3,631 | $60,571 | 440.8 | 6.2% |
| 59632 | Boulder | Standard | 2,557 | $68,750 | 477.0 | 17.3% |
| 59638 | Jefferson City | PO Box | 769 | $126,723 | 72.9 | -1.4% |
| 59721 | Cardwell | Standard | 423 | $94,167 | 219.8 | -24.9% |
| 59631 | Basin | PO Box | 375 | — | 173.7 | 60.9% |