Lewis and Clark County, Montana Population 2024

76,490

Lewis and Clark County, Montana's estimated 2024 population is 76,490 with a growth rate of 1.77% in the past year according to the most recent United States census data. Lewis and Clark County, Montana is the 6th largest county in Montana. The 2010 population was 63,578 and has seen a growth of 20.31% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202983,1351,3291.62%
202881,8061,3291.65%
202780,4771,3291.68%
202679,1481,3291.71%
202577,8191,3291.74%
202476,4901,3291.77%
202375,1611,3291.8%
202273,8321,3291.83%
202172,5031,3351.88%
202071,1681,5902.29%
201969,5788031.17%
201868,7757871.16%
201767,9889871.47%
201667,0016931.05%
201566,3085440.83%
201465,7644870.75%
201365,2775170.8%
201264,7604760.74%
201164,2847061.11%
201063,578
199047,4954,45610.35%
198043,0399,75829.32%
197033,2815,27518.84%
196028,0063,46614.12%
195024,5402,40910.89%
194022,1313,90721.44%
193018,224-436-2.34%
192018,660-3,193-14.61%
191021,8532,68213.99%
190019,171260.14%
189019,14512,624193.59%
18806,5211,48129.38%
18705,040-78,095-93.94%
showing: 33 rows
2024 Growth Rate
1.77% (1,329)
State
Montana
County Seat
2010 Population
63,578
Area
3459 mi²
Density
22 people/mi²
Growth Since 2010
20.31% (12,912)
Founded
1865

Lewis and Clark County, Montana Population 2024

Population by Race

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Race
Population
Percentage (of total)
White65,85692.12%
Two or more races3,3884.74%
Native American9121.28%
Asian4850.68%
Other race4380.61%
Black or African American4080.57%
Native Hawaiian or Pacific Islander
showing: 7 rows

White

Two or more races

Native American

Asian

Other race

Black or African American

Native Hawaiian or Pacific Islander

Lewis and Clark County, Montana Population by Race

Lewis and Clark County, Montana Population Pyramid 2024

Lewis and Clark County, Montana Median Age

41.2

Total

40

Male

42.6

Female

Lewis and Clark County, Montana Adults

There are 56,250 adults, (13,917 of whom are seniors) in Lewis and Clark County, Montana.

Lewis and Clark County, Montana Age Dependency

68.9

Age Dependency Ratio

32.9

Old Age Dependency Ratio

36

Child Dependency Ratio

Lewis and Clark County, Montana Sex Ratio

Female35,74950.01%
Male35,73849.99%

Lewis and Clark County, Montana Population by Age

Lewis and Clark County, Montana Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All30,2812.3170.529.5
Married14,4452.948812
Non Family12,1791.351.848.2
Female2,3433.2264.535.5
Male1,3142.9962.337.7
showing: 5 rows

2.9

Average Family Size

2.31

Average Household Size

70.5%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Lewis and Clark County, Montana Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Lewis and Clark County, Montana Educational Attainment by Sex (over 25)

Lewis and Clark County, Montana Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among other race people with a rate of 96.83%.

The highest rate of bachelors degrees is among asian people with a rate of 62.4%.

Lewis and Clark County, Montana Educational Attainment by Race

All

Male

Female

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$49,034

Average Earnings

$56,695

Average Male

$42,740

Average Female

Lewis and Clark County, Montana Earnings by Educational Attainment

Lewis and Clark County, Montana Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Lewis and Clark County, Montana Language

96.77% of Lewis and Clark County, Montana residents speak only English, while 3.23% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 1.73% of the population.

Lewis and Clark County, Montana Language

Lewis and Clark County, Montana Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White62,9325,7149.08%
Hispanic2,57630511.84%
Multiple3,3332698.07%
Native84825329.83%
Black4009223%
Asian46810.21%
showing: 6 rows

9.37%

Overall Poverty Rate

8.88%

Male Poverty Rate

9.86%

Female Poverty Rate

Poverty in Lewis and Clark County, Montana

The race most likely to be in poverty in Lewis and Clark County, Montana is Native, with 29.83% below the poverty level.

The race least likely to be in poverty in Lewis and Clark County, Montana is Asian, with 0.21% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.01%. Among those working part-time, it was 13.55%, and for those that did not work, the poverty rate was 15.26%.

Lewis and Clark County, Montana Poverty

rate

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Rate
Poverty
Less Than 9th Grade36.13%
High School12.62%
Some College6.95%
Bachelors or Greater3.08%
showing: 4 rows

Lewis and Clark County, Montana Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed49.42%
Male Unemployed10.56%
Female Employed6.38%
Male Employed4.83%
showing: 4 rows

Lewis and Clark County, Montana Poverty Rate by Employment Status and Sex

Lewis and Clark County, Montana Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Lewis and Clark County, Montana Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

51.5%

Overall Marriage Rate

52.5%

Male Marriage Rate

50.5%

Female Marriage Rate

Lewis and Clark County, Montana Married by Age and Sex

male

female

Lewis and Clark County, Montana Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 35-44.

Lewis and Clark County, Montana Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Lewis and Clark County, Montana Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

6,011

Number of Veterans

5,146

Male Veterans

865

Female Veterans

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Lewis and Clark County, Montana Veterans by War

count

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Lewis and Clark County, Montana Veterans by Age

count

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Lewis and Clark County, Montana Veterans by Race

Lewis and Clark County, Montana Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

9.37%

Veteran Poverty Rate

27.63%

Veteran Disability Rate

Lewis and Clark County, Montana Veterans by Education

LaborForceParticipation

65.1%

Labor Force Participation

62.4%

Employment Rate

3.5%

Unemployment Rate

Lewis and Clark County, Montana Employment by Age

LaborForceParticipation

Lewis and Clark County, Montana Employment by Race

LaborForceParticipation

Lewis and Clark County, Montana Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

52.99%

Born in Lewis and Clark County, Montana

98.14%

Native Born

1.86%

Foreign Born

0.82%

Non Citizen

1.04%

Naturalized

Place of Birth

98.14% of Lewis and Clark County, Montana residents were born in the United States, with 52.99% having been born in Montana. 0.82% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Lewis and Clark County, Montana Place of Birth

Sources