ZIP codes

ZIP codes in Gallatin County, Montana

Gallatin County has 10 ZIP codes. 5 lie entirely inside it and 5 are shared with neighboring counties, so part of their land and their people are elsewhere. About 124,917 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 10; With 1% or more of their land inside
Entirely inside: 5; 99% or more of their land
Shared with other counties: 5; Most with Madison County (2)
Most populated ZIP: 59718; 44,585 people · Four Corners
Least populated ZIP: 59760; 221 people · Willow Creek
Largest ZIP by land: 59730; 686 sq mi · Big Sky

Map of the ZIP codes in Gallatin County

Entirely in the county (99% or more of its land)
Shared, mostly in this county
Shared, mostly in other counties
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Gallatin County

10 ZIP codes in Gallatin County, MT, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
59086	Sedan	792	31%	≈ 414
59714	Sedan	24,282	100%	24,282
59715	Bozeman	39,643	92%	≈ 39,525
59716	Big Sky	1,795	44%	≈ 1,128
59718	Four Corners	44,585	100%	44,585
59730	Big Sky	2,399	94%	≈ 2,318
59741	Gallatin River Ranch	5,748	100%	5,748
59752	Wheatland	5,404	62%	≈ 4,516
59758	West Yellowstone	2,180	100%	2,180
59760	Willow Creek	221	100%	221

ZIP codes shared with other counties

These 5 ZIP codes have part of their land in another county. The first figure is the share of their land in Gallatin County; then, where the rest lies.

59086 (Sedan): 31% here; 66% in Park County and 2.3% in Meagher County.
59715 (Bozeman): 92% here; 8.2% in Park County.
59716 (Big Sky): 44% here; 56% in Madison County.
59730 (Big Sky): 94% here; 5.9% in Madison County.
59752 (Wheatland): 62% here; 20% in Jefferson County and 18% in Broadwater County.

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Big Sky (2), Sedan (2), Bozeman (1), Four Corners (1), Gallatin River Ranch (1), and West Yellowstone (1); 8 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 590 and 597.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

Spotted a mistake? Let us know