There are 11 zip codes in Big Horn County, Montana. The most populated is 59034, located in Hardin. * 2024 populations estimated based on the latest ACS 5-year data.

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Zip Code
Population
City
590345,199Hardin
590222,180Crow Agency
590501,602Lodge Grass
59016966Busby
59066660Pryor
59089576Wyola
59031473Garryowen
59064244Pompeys Pillar
59035182Fort Smith
59075172Saint Xavier
5902532Decker

Zip Codes in Big Horn County, Montana by Population (2024)