ZIP codes

ZIP codes in Yellowstone County, Montana

Yellowstone County has 15 ZIP codes. 7 lie entirely inside it and 8 are shared with neighboring counties, so part of their land and their people are elsewhere. About 168,931 people live in the parts inside it (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 15; 1 more just touches the border (under 1% of their land)
Entirely inside: 7; 99% or more of their land
Shared with other counties: 8; Most with Big Horn County (4)
Most populated ZIP: 59102; 47,977 people · Billings
Least populated ZIP: 59002; 221 people · Acton
Largest ZIP by land: 59101; 591 sq mi · Lockwood

Map of the ZIP codes in Yellowstone 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 Yellowstone County

15 ZIP codes in Yellowstone County, MT, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
59002	Acton	221	100%	221
59006	Ballantine	586	100%	586
59015	Mountain View Colony	394	52%	≈ 341
59024	Custer	335	92%	≈ 299
59037	Huntley	2,336	93%	≈ 2,226
59041	Silesia	2,258	2.6%	≈ 45
59044	Laurel	12,302	91%	≈ 12,110
59057	—	782	32%	≈ 615
59064	Pompeys Pillar	211	28%	≈ 47
59079	Shepherd	3,940	100%	3,940
59088	Worden	1,265	100%	1,265
59101	Lockwood	42,250	98%	≈ 42,240
59102	Billings	47,977	100%	47,977
59105	Billings	35,480	100%	35,480
59106	Billings	21,417	100%	21,417

They also touch the county with under 1% of their land, so they aren’t counted: 59063.

ZIP codes shared with other counties

These 8 ZIP codes have part of their land in another county. The first figure is the share of their land in Yellowstone County; then, where the rest lies.

59015 (Mountain View Colony): 52% here; 29% in Stillwater County and 19% in Musselshell County.
59024 (Custer): 92% here; 8.0% in Big Horn County.
59037 (Huntley): 93% here; 7.3% in Big Horn County.
59041 (Silesia): 2.6% here; 97% in Carbon County.
59044 (Laurel): 91% here; 8.8% in Carbon County.
59057: 32% here; 68% in Stillwater County.
59064 (Pompeys Pillar): 28% here; 72% in Big Horn County.
59101 (Lockwood): 98% here; 2.3% in Big Horn 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 Billings (3), Acton (1), Ballantine (1), Custer (1), Huntley (1), and Laurel (1); 12 places in all.

They start with 2 different three-digit prefixes, one per USPS sorting center: 590 and 591.

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