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Welcome to Lewis and Clark County ...
Time Zone: Lewis and Clark County lies in the Mountain Time Zone (MST/MDT) and observes daylight saving time.
Lewis and Clark County is one of the original counties of Montana and was founded in 1864.
From the Census Estimates for 2019, <1> Lewis and Clark had a population of 69,578 people. This is an increase of 9.75% since the last Census (which gave a population of 63,395 people in 2010).
At the time of the 2010 Census, Lewis and Clark represented 6.41% of the total population of Montana.
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This page was last modified/updated: 17 Sep 2023