Yellowstone County, Montana

Yellowstone County is a county in Montana with an estimated population of 170,843 in 2023. 2 cities, towns and Census places in it are indexed here.

Largest places in Yellowstone County

About Yellowstone County

Yellowstone County is one of the counties of Montana. County governments in Montana handle local services such as courts, property records and elections; cities and towns inside the county run their own municipal services. Population figures come from the Census Bureau's Vintage 2023 estimates, which are updated annually.