County ZIP codes · Montana · FIPS 30031
Gallatin County, MT ZIP Codes
Gallatin County, Montana has 14 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 10 residential and 4 for PO boxes or a single organization. 8 of the residential ones lie mainly in Gallatin County and 2 mainly in a neighboring county; 5 cross the county line. Median household income ranges from $86,767 in 59752 (Three Forks) to $141,716 in 59716 (Big Sky) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Gallatin County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $88,407 and $98,305.
They carry 9 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 10 residential ZIP codes in Gallatin County
8 ZIP codes lie mainly in Gallatin County; 2 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 59718 | Bozeman | 44,585 | 271 | $99k | $646k | 100% |
| 59715 | Bozeman | 39,643 | 134 | $88k | $848k | 92% |
| 59714 | Belgrade | 24,282 | 58 | $96k | $549k | 100% |
| 59741 | Manhattan | 5,748 | 35 | $91k | $615k | 100% |
| 59752 | Three Forks | 5,404 | 13 | $87k | $461k | 62% |
| 59730 | Gallatin Gateway | 2,399 | 3 | $98k | $1.01M | 94% |
| 59758 | West Yellowstone | 2,180 | 5 | $66k | $577k | 100% |
| 59760 | Willow Creek | 221 | 5 | $64k | $464k | 100% |
Partly in Gallatin County
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
5 ZIP codes of Gallatin County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Gallatin | Elsewhere |
|---|---|---|
| 59715 | 92% | Park County8% |
| 59752 | 62% | Jefferson County20%; Broadwater County18% |
| 59730 | 94% | Madison County6% |
| 59716 | 44% | Madison County56% |
| 59086 | 31% | Park County66%; Meagher County2% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Gallatin County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Gallatin County's ZIP codes use 2 prefixes: 590 and 597.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.