| ZIP Codes: | 11 ZIP Codes (6 Standard, 5 PO Box, 0 Unique) [See All] |
| Area Code: | 406 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 11:54:12 PM |
| Population: | 8,186 [See All] |
| FIPS: | 30057 |
| Land Area: | 3,225 sq mi |
| Water Area: | 15 sq mi |
| Coordinates: | 45.4214, -111.9230 |
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8,186 residents live across 11 ZIPs covering 3,225 sq mi, served by 11 distinct USPS-recognized cities.
Population moved from 6,450 to 8,186 from 2014 to 2024 — a +26.9% change. 5 ZIPs gained residents, 6 lost.
The county's wealthiest ZIP 59755 (Virginia City, $96,250 median) and poorest ZIP 59710 (Alder, $50,885) are 22.1 miles apart — a 1.9× income gap across local geography.
Median home values vary 2.1× across this county — from $365,000 in 59751 (Silver Star) to $761,700 in 59720 (Cameron).
Density varies 103× across the county — from 0 people/sq mi in 59720 (Cameron) to 27 in 59747 (Pony).
Educational attainment ranges from 10.8% bachelor's+ in 59745 (Norris) to 53.7% in 59720 (Cameron) — the breadth of educational profiles across the area.
Within Montana, this is the #27 most populous of 56 counties and ranks #19 for median household income with the #3 fastest decade growth .
On the national stage, Madison County is and #80 for decade growth .
Weighted by population, the typical household earns about $78,922 across the county — reflecting what a typical resident sees, not a simple ZIP average.
32.4% of adults age 25+ hold a bachelor's degree or higher (2,057 of 6,345 reporting).
6 Standard delivery, 5 PO Box only, 0 single-entity Unique ZIPs serve this county.
Madison County grew 26.9% over the past decade — concentrated in 2 high-growth ZIPs:
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 |
|---|---|---|---|---|---|---|
| 59729 | Ennis | Standard | 3,258 | $83,365 | 479.5 | 61.8% |
| 59749 | Sheridan | Standard | 2,029 | $80,238 | 231.8 | 37.5% |
| 59754 | Twin Bridges | Standard | 980 | $76,923 | 414.6 | 10.9% |
| 59735 | Harrison | PO Box | 440 | $74,125 | 186.3 | 15.5% |
| 59740 | Mc Allister | PO Box | 428 | — | 185.8 | 31.3% |
| 59710 | Alder | PO Box | 226 | $50,885 | 720.7 | -12.4% |
| 59720 | Cameron | Standard | 220 | $66,538 | 824.0 | -22.0% |
| 59751 | Silver Star | Standard | 215 | $55,938 | 20.6 | -22.7% |
| 59755 | Virginia City | PO Box | 170 | $96,250 | 93.3 | -28.6% |
| 59747 | Pony | PO Box | 122 | $80,250 | 4.4 | -30.7% |
| 59745 | Norris | Standard | 98 | $56,667 | 64.2 | -28.5% |