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Population Review

What is the population of Lewis and Clark County, MT?

Lewis and Clark County in Montana has a population of 72,580, per Census ACS 5-Year estimates. The median household income is $74,543 and the median age is 41.3.

Context

Counties are the primary administrative subdivisions of states and a stable unit for tracking population. Lewis and Clark County's population reflects everyone within county lines, including residents of incorporated cities and unincorporated areas.

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Lewis and Clark County in Montana has a population of 72,580, per Census ACS 5-Year estimates. The median household income is $74,543 and the median age is 41.3.