Lewis and Clark County, Montana Population 2020

Lewis and Clark County, Montana's estimated population is 67,849 with a growth rate of 1.42% 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.

Year Population Growth Growth Rate
201868,7008511.25%
201767,8499471.42%
201666,9026741.02%
201566,2285240.80%
201465,7044720.72%
201365,2325020.78%
201264,7304680.73%
201164,2626871.08%
201063,57516,08033.86%
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%
18705,0400.00%

How Many People Live in Lewis and Clark County, Montana?

67,849

Lewis and Clark County, Montana Population Growth

Population by Race

Race Population Percentage
White62,92193.80%
Two or More Races1,9302.88%
American Indian and Alaska Native1,2071.80%
Asian4240.63%
Some Other Race3660.55%
Black or African American1850.28%
Native Hawaiian and Other Pacific Islander440.07%

Lewis and Clark County, Montana Population Pyramid 2020

Lewis and Clark County, Montana Median Age

41


Total

40.1


Male

42.5


Female

Lewis and Clark County, Montana Adults

There are 52,505 adults, (11,607 of whom are seniors) in Lewis and Clark County, Montana.

Lewis and Clark County, Montana Age Dependency

64

Age Dependency Ratio

28.4

Old Age Dependency Ratio

35.6

Child Dependency Ratio

Lewis and Clark County, Montana Sex Ratio

Female

33,891

50.53%

Male

33,186

49.47%

Lewis and Clark County, Montana Households and Families

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

Lewis and Clark County, Montana Household Types

Type Owner Renter
Married84.7%15.3%
All68.5%31.5%
Female58.7%41.3%
Non Family51.8%48.2%
Male51.3%48.7%

68.5%

Rate of Home Ownership

Type Count Average Size Owned
All27,8002.3568.5
Married13,6162.9484.7
Non Family10,5731.2751.8
Female2,5763.3258.7
Male1,0353.1651.3

2.92

Average Family Size

2.35

Average Household Size

7%

Unmarried (Opposite Sex)

0.2%

Unmarried (Same Sex)

Lewis and Clark County, Montana Education

Education Attained Count Percentage
Less Than 9th Grade7141.52%
9th to 12th Grade1,6423.49%
High School Graduate11,49824.47%
Some College11,05223.52%
Associates Degree3,9738.45%
Bachelors Degree11,22223.88%
Graduate Degree6,89614.67%

Lewis and Clark County, Montana Educational Attainment by Race

Name Total High School Bachelors
White43,97241,91317,204
Hispanic1,053959327
Multiple Races862837216
Native American725579152
Asian307301203
Other Race17410134
Black956911
Islander77

The highest rate of high school graduation is among islander people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 66.12%.

Name Average Male Female
Overall$39,457$44,632$35,002
Less Than High School$15,913$16,118$15,678
High School Grad$28,801$31,281$24,857
Some College$36,475$41,440$30,961
Bachelors Degree$50,651$55,427$42,175
Graduate Degree$60,953$71,522$53,025

$39,457

Average Earnings

$44,632

Average Male

$35,002

Average Female

Lewis and Clark County, Montana Language

Lewis and Clark County, Montana Language by Age

Lewis and Clark County, Montana Language

97.40% of Lewis and Clark County, Montana residents speak only English, while 2.60% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.64% of the population.

Lewis and Clark County, Montana Poverty

Lewis and Clark County, Montana Poverty by Race

Name Total In Poverty Poverty Rate
White60,1496,09110.13%
Hispanic2,04868333.35%
Multiple1,84931316.93%
Native1,13127824.58%
Black15810063.29%
Other3618824.38%
Asian405133.21%

11.24%

Overall Poverty Rate

10.90%

Male Poverty Rate

11.57%

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 Black, with 63.29% below the poverty level.

The race least likely to be in poverty in Lewis and Clark County, Montana is Asian, with 3.21% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.28%. Among those working part-time, it was 16.15%, and for those that did not work, the poverty rate was 18.70%.

Name Poverty
Less Than High School31.41%
High School17.57%
Some College6.09%
Bachelors or Greater3.15%

Lewis and Clark County, Montana Income

Lewis and Clark County, Montana Income by Household Type

Name Median Mean
Households$62,130$76,249
Families$79,085$91,574
Married Families$88,726$102,776
Non Families$39,395$48,341

Lewis and Clark County, Montana Marital Status

Lewis and Clark County, Montana Marital Status

Marriage Rates

51.9%

Overall Marriage Rate

52.4%

Male Marriage Rate

51.4%

Female Marriage Rate

Lewis and Clark County, Montana Married by Age and Sex

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 45-54.

Lewis and Clark County, Montana Marital Status by Race

Lewis and Clark County, Montana Veterans

6,309

Number of Veterans

5,620

Male Veterans

689

Female Veterans

War Veterans
Vietnam2,125
Second Gulf War1,698
First Gulf War1,476
Korea452
World War II276
Name Veterans % of Total
White6,08012.26%
Hispanic1369.94%
2 or More1049.79%
Indian889.40%
Asian298.41%
Black86.56%

$Lewis and Clark County, Montana Veterans by Education

8.23%

Veteran Poverty Rate

28.75%

Veteran Disability Rate

Lewis and Clark County, Montana Employment Status

66.1%

Labor Force Participation

63.7%

Employment Rate

3.1%

Unemployment Rate

Lewis and Clark County, Montana Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

55.49%

Born in Montana

98.59%

Native Born

1.41%

Foreign Born

0.60%

Non Citizen

Place of Birth

98.59% of Lewis and Clark County, Montana residents were born in the United States, with 55.49% having been born in Montana. 0.60% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990