Gallatin County, Montana

Gallatin County is a county in Montana with an estimated population of 126,409 in 2023. 5 cities, towns and Census places in it are indexed here.

Largest places in Gallatin County

About Gallatin County

Gallatin 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.