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County ZIP codes · Montana · FIPS 30003

Big Horn County, MT ZIP Codes

Big Horn County, Montana has 18 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 11 of the residential ones lie mainly in Big Horn County and 7 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $53,083 in 59022 (Crow Agency) to $105,099 in 59037 (Huntley) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Big Horn County?

59010 · Bighorn: $73k59016 · Busby: $59k59022 · Crow Agency: $53k59024 · Custer: $78k59025 · Decker: $37k59031 · Garryowen: –59034 · Hardin: $61k59035 · Fort Smith: $52k59037 · Huntley: $105k59038 · Hysham: $57k59043 · Lame Deer: $29k59050 · Lodge Grass: $63k59064 · Pompeys Pillar: –59066 · Pryor: $52k59075 · Saint Xavier: $24k59089 · Wyola: $63k59101 · Billings: $59k82801 · Sheridan: $73k59038590345905082801590245910159016590255901059043590755906659064590225903759089590355903159010 · Bighorn: $73k59016 · Busby: $59k59022 · Crow Agency: $53k59024 · Custer: $78k59025 · Decker: $37k59031 · Garryowen: –59034 · Hardin: $61k59035 · Fort Smith: $52k59037 · Huntley: $105k59038 · Hysham: $57k59043 · Lame Deer: $29k59050 · Lodge Grass: $63k59064 · Pompeys Pillar: –59066 · Pryor: $52k59075 · Saint Xavier: $24k59089 · Wyola: $63k59101 · Billings: $59k82801 · Sheridan: $73k59038590345905082801590245910159016590255901059043590755906659064590225903759089590355903159010 · Bighorn: $73k59016 · Busby: $59k59022 · Crow Agency: $53k59024 · Custer: $78k59025 · Decker: $37k59031 · Garryowen: –59034 · Hardin: $61k59035 · Fort Smith: $52k59037 · Huntley: $105k59038 · Hysham: $57k59043 · Lame Deer: $29k59050 · Lodge Grass: $63k59064 · Pompeys Pillar: –59066 · Pryor: $52k59075 · Saint Xavier: $24k59089 · Wyola: $63k59101 · Billings: $59k82801 · Sheridan: $73k590385903459050828015902459101590165902559043590755906659064590225908959035
The residential ZIP codes of Big Horn County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$54.1k$98.1k+no figure

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 $58,598 and $62,500.

They carry 18 postal town names.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).

All 18 residential ZIP codes in Big Horn County

11 ZIP codes lie mainly in Big Horn County; 7 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Big Horn County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
59034 Hardin 5,008 6 $61k $170k 100%
59022 Crow Agency 2,307 15 $53k $58k 100%
59050 Lodge Grass 1,338 2 $63k $113k 100%
59016 Busby 1,044 2 $59k $146k 100%
59089 Wyola 801 3 $63k – 100%
59066 Pryor 539 2 $52k $96k 100%
59031 Garryowen 391 4 – $107k 100%
59064 Pompeys Pillar 211 1 – $290k 72%
59035 Fort Smith 180 2 $52k $139k 100%
59075 Saint Xavier 125 1 $24k $212k 100%
59025 Decker 53 0 $37k – 100%

Partly in Big Horn County

Residential ZIP codes mainly in another county that reach at least 1% into Big Horn County, by their share here
In this county
59010 Bighorn 220 1 $73k $345k 45%
59043 Lame Deer 2,727 8 $29k $111k 30%
59038 Hysham 750 1 $57k $227k 13%
59024 Custer 335 1 $78k $240k 8%
59037 Huntley 2,336 19 $105k $354k 7%
82801 Sheridan 26,310 50 $73k $387k 3%
59101 Billings 42,250 72 $59k $269k 2%

Download the 18 ZIP codes as CSV

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?

8 ZIP codes of Big Horn County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Big Horn County and in the neighboring counties
ZIPIn Big HornElsewhere
591012%Yellowstone County98%
828013%Sheridan County97%
5904330%Rosebud County70%
590377%Yellowstone County93%
5903813%Treasure County87%
590248%Yellowstone County92%
5901045%Treasure County55%
5906472%Yellowstone County28%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Big Horn County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Big Horn County's ZIP codes use 3 prefixes: 590, 591 and 828.

Three-digit prefixes of Big Horn County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Big Horn County's
PrefixSectional centerHereAll codes
590Billings, MT (SCF 590)1675
591Billings, MT (SCF 590)114
828Casper, WY (SCF 826)114

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.