Lewis and Clark County, Montana

Lewis and Clark County: County in Montana, United States

About

Lewis and Clark County is a county located in the U.S. state of Montana. As of the 2010 census, the population was 63,395 and a population density of 7 people per km². After 10 years in 2020 county had an estimated population of 70,229 inhabitants. Its county seat is Helena. The county was created 159 years ago in 1864.

Lewis and Clark County locator map
Location of Lewis and Clark County on Montana map.

Quick Facts about Lewis and Clark County

Population : 70,229 (2020)
Country : United States of America
State : Montana (United States)
Different from : Lewis County, Lewis County, Lewis County, Lewis County, Lewis County, Lewis County, Lewis County
Area : 9059 km2
Water as percent of area : 1.1%
Land as percent of area : 98.9%
Named for : William Clark, Meriwether Lewis
Altitude : 5,082 feet / 1549 meters
Capital : Helena
Establishment : January 01, 1865
Time Zone : America/Denver
Local time : 02:09:23 (20th April 2024)
Density : 8 Pop. per km² as of 2020
Population growth : 9.73% (2010-2020)
Sleeping Giant 2010 image
Sleeping Giant 2010
Sleeping Giant 2010 image
Sleeping Giant 2010 image

Geography

Lewis and Clark County is located at 47°7'20"N 112°23'25"W (47.1223400, -112.3903500). It has 7 neighbors: Powell County, Broadwater County, Cascade County, Flathead County, Jefferson County, Meagher County and Teton County.

Lewis and Clark County map

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The largest city of Lewis and Clark County is Helena with a population of 33,737. . See all Lewis and Clark County cities & populated places.

Lewis and Clark County Populated Places

Cities, towns, neighborhoods & other populated places in Lewis and Clark County.

City Name Population Title
Helena 33,737 State capital of Montana, United States and seat of Lewis and Clark County
East Helena 2,130 Town of the United States

Lewis and Clark County has 7 neighbours.

  • Helena

Demographics

The population of Lewis and Clark County increased by 9.73% in 10 years.

Year Population % Change Method
2010 63,395 - census
2011 64,272 1.36% estimation process
2012 64,736 0.72% estimation process
2013 65,234 0.76% estimation process
2014 65,703 0.71% estimation process
2015 66,225 0.79% estimation process
2016 66,894 1% estimation process
2017 67,850 1.41% estimation process
2018 68,622 1.13% estimation process
2019 69,432 1.17% estimation process
2020 70,229 1.13% estimation process

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People born in Lewis and Clark County (1)

American labor leader W. A. Boyle was born in Lewis and Clark County

Montana Other Counties (more counties)

County Name Population Title
Yellowstone County 162,990 County in Montana, United States of America
Missoula County 121,630 County in Montana, United States
Billings 117,445 The most populous city in Montana.
Gallatin County 116,806 County in Montana, United States
Flathead County 105,851 County in Montana, United States
Cascade County 81,346 County in central Montana, United States
Missoula 76,848 The most populous city in Missoula County, Montana.
Great Falls 58,353 Town in Cascade County, Montana, United States
Bozeman 50,970 Town in Gallatin County, Montana, United States
Ravalli County 45,002 County in Montana, United States
Silver Bow County 35,180 County in Montana, United States
Butte 34,190 Consolidated city-county in Montana, United States
Helena 33,737 State capital of Montana, United States and seat of Lewis and Clark County
Lake County 30,986 County in Montana, United States
Kalispell 25,329 City in Flathead County, Montana, United States
Lincoln County 20,343 County in Montana, United States