| ZIP Codes: | 13 ZIP Codes (7 Standard, 6 PO Box, 0 Unique) [See All] |
| Area Code: | 406 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 2:12:52 PM |
| Population: | 126,257 [See All] |
| FIPS: | 30031 |
| CBSA: | Bozeman, MT |
| Land Area: | 2,684 sq mi |
| Water Area: | 29 sq mi |
| Coordinates: | 45.6062, -111.2247 |
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126,257 residents live across 13 ZIPs covering 2,684 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 94,127 to 126,257 from 2014 to 2024 — a +34.1% change. 7 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 59716 (Big Sky, $141,716 median) and poorest ZIP 59758 (West Yellowstone, $66,375) are 36.0 miles apart — a 2.1× income gap across local geography.
Median home values vary 2.4× across this county — from $461,100 in 59752 (Three Forks) to $1,094,900 in 59716 (Big Sky).
Density varies 76× across the county — from 4 people/sq mi in 59730 (Gallatin Gateway) to 282 in 59718 (Bozeman).
Educational attainment ranges from 23.1% bachelor's+ in 59752 (Three Forks) to 67.2% in 59715 (Bozeman) — the breadth of educational profiles across the area.
Within Montana, this is the #2 most populous of 56 counties and ranks #4 for median household income with the #1 fastest decade growth .
On the national stage, Gallatin County is and #42 for decade growth .
Weighted by population, the typical household earns about $94,254 across the county — reflecting what a typical resident sees, not a simple ZIP average.
53.8% of adults age 25+ hold a bachelor's degree or higher (44,522 of 82,684 reporting). The most-educated ZIPs cluster around Bozeman.
7 Standard delivery, 6 PO Box only, 0 single-entity Unique ZIPs serve this county.
1 ZIP in this county where more than 60% of adults 25+ hold a bachelor's degree — typically college campuses, research enclaves, or tech corridors.
Gallatin County grew 34.1% over the past decade — concentrated in 4 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 |
|---|---|---|---|---|---|---|
| 59718 | Bozeman | Standard | 44,585 | $99,123 | 158.0 | 59.0% |
| 59715 | Bozeman | Standard | 39,643 | $88,407 | 309.8 | 21.4% |
| 59714 | Belgrade | Standard | 24,282 | $96,183 | 388.5 | 26.1% |
| 59741 | Manhattan | Standard | 5,748 | $90,947 | 208.4 | 36.6% |
| 59752 | Three Forks | Standard | 5,404 | $86,767 | 473.7 | 61.9% |
| 59730 | Gallatin Gateway | Standard | 2,399 | $98,305 | 646.3 | 18.1% |
| 59758 | West Yellowstone | Standard | 2,180 | $66,375 | 435.7 | 6.8% |
| 59716 | Big Sky | PO Box | 1,795 | $141,716 | 63.4 | -19.6% |
| 59760 | Willow Creek | PO Box | 221 | $63,571 | 0.7 | -29.8% |
| 59717 | Bozeman | PO Box | — | — | 0.0 | — |
| 59771 | Bozeman | PO Box | — | — | 0.0 | — |
| 59719 | Bozeman | PO Box | — | — | 0.0 | — |
| 59772 | Bozeman | PO Box | — | — | 0.0 | — |