Lewis and Clark County, Montana

Lewis and Clark County is a county in Montana with an estimated population of 75,011 in 2023. 2 cities, towns and Census places in it are indexed here.

Largest places in Lewis and Clark County

About Lewis and Clark County

Lewis and Clark 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.