Jefferson County, Montana Population 2022

Jefferson County, Montana's estimated population is 12,602 with a growth rate of 1.02% in the past year according to the most recent United States census data. Jefferson County, Montana is the 16th largest county in Montana. The 2010 Population was 11,407 and has seen a growth of 10.48% since this time.

Note: 2021 and 2022 data is projected
Year Population Growth Annual Growth Rate
18701,5310.00%
18802,46493360.94%
18906,0263,562144.56%
19005,330-696-11.55%
19105,6012715.08%
19205,203-398-7.11%
19304,133-1,070-20.57%
19404,66453112.85%
19504,014-650-13.94%
19604,2972837.05%
19705,23894121.90%
19807,0291,79134.19%
19907,93991012.95%
201011,4073,46843.68%
201111,375-32-0.28%
201211,318-57-0.50%
201311,4551371.21%
201411,502470.41%
201511,572700.61%
201611,7792071.79%
201711,9211421.21%
201812,0941731.45%
201912,2211271.05%
202012,3481271.04%
202112,4751271.03%
202212,6021271.02%
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Jefferson County, Montana Population Growth

Population by Race

Race Population Percentage
White11,32893.86%
Black or African American820.68%
American Indian and Alaska Native1221.01%
Asian80.07%
Some Other Race1461.21%
Two or More Races3833.17%
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Jefferson County, Montana Population by Race

Jefferson County, Montana Population Pyramid 2022

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Jefferson County, Montana Median Age

47.5


Total

47.1


Male

47.9


Female

Jefferson County, Montana Adults

There are 9,535 adults, (2,557 of whom are seniors) in Jefferson County, Montana.

Jefferson County, Montana Age Dependency

Age Dependency Ratio

36.6

Old Age Dependency Ratio

36.3

Child Dependency Ratio

Jefferson County, Montana Sex Ratio

Female

5,924

49.08%

Male

6,145

50.92%

Jefferson County, Montana Population by Age

Jefferson County, Montana Renter vs Owner Occupied by Household Type

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Jefferson County, Montana Household Types

Type Owner Renter
Married90.4%9.6%
All84.2%15.8%
Non Family74.6%25.4%
Female70.5%29.5%
Male57.9%42.1%

84.2%

Rate of Home Ownership

Jefferson County, Montana Households and Families

Type Count Average Size Owned
All4,4452.6584.2
Married2,9393.0890.4
Male1642.9957.9
Female2173.8770.5
Non Family1,1251.2774.6

3.04

Average Family Size

2.65

Average Household Size

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Jefferson County, Montana Households by Type

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Education Attained Count Percentage
Less Than 9th Grade1151.31%
9th to 12th Grade3263.72%
High School Graduate2,41127.51%
Some College1,81820.74%
Associates Degree1,00711.49%
Bachelors Degree2,13224.33%
Graduate Degree95510.90%
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Jefferson County, Montana Educational Attainment by Sex (over 25)

Jefferson County, Montana Educational Attainment by Race

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Race Total High School Bachelors
Black686862
White8,2887,8842,972
Hispanic1149230
2+ Races24224225
Other Race1011
Asian88
Native American4934

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

The highest rate of bachelors degrees is among black people with a rate of 91.18%.

Jefferson County, Montana Educational Attainment by Race

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Name Average Male Female
Overall$41,201$50,890$29,000
Less Than 9th Grade$$51,458$2,500
High School Graduate$33,105$40,086$18,938
Some College$39,911$52,118$25,972
Bachelors Degree$43,163$51,071$38,056
Graduate Degree$72,188$106,875$58,750

$41,201

Average Earnings

$50,890

Average Male

$29,000

Average Female

Jefferson County, Montana Earnings by Educational Attainment

Jefferson County, Montana Language by Age

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Jefferson County, Montana Language

98.26% of Jefferson County, Montana residents speak only English, while 1.74% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0.88% of the population.

Jefferson County, Montana Language

Jefferson County, Montana Poverty by Race

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Name Total In Poverty Poverty Rate
White11,0427266.57%
OtherNaN%
Hispanic307278.79%
Multiple379184.75%

6.48%

Overall Poverty Rate

5.78%

Male Poverty Rate

7.21%

Female Poverty Rate

Poverty in Jefferson County, Montana

The race most likely to be in poverty in Jefferson County, Montana is White, with 6.57% below the poverty level.

The race least likely to be in poverty in Jefferson County, Montana is Multiple, with 4.75% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.42%. Among those working part-time, it was 6.62%, and for those that did not work, the poverty rate was 13.37%.

Jefferson County, Montana Poverty

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Name Poverty
Less Than 9th Grade14.74%
High School7.10%
Some College4.50%
Bachelors or Greater6.07%

Jefferson County, Montana Poverty Rate by Education

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Rate Poverty
Male Employed3.26%
Male Unemployed0.00%
Female Employed4.70%
Female Unemployed2.68%

Jefferson County, Montana Poverty Rate by Employment Status and Sex

Jefferson County, Montana Income by Household Type

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Name Median Mean
Households$71,779$85,981
Families$87,633$99,079
Married Families$90,822-
Non Families$34,583$45,206
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Income by Household Type

Jefferson County, Montana Marital Status

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Marriage Rates

62.4%

Overall Marriage Rate

61.6%

Male Marriage Rate

63.2%

Female Marriage Rate

Jefferson County, Montana Married by Age and Sex

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Jefferson County, Montana Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 45-54.

Jefferson County, Montana Marital Status by Race

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Jefferson County, Montana Marital Status

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1,203

Number of Veterans

Male Veterans

Female Veterans

War Veterans
Second Gulf War190
First Gulf War377
Vietnam508
Korea42
World War II46

Jefferson County, Montana Veterans by War

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Age Group Veterans
18 to 347
35 to 54358
55 to 64219
65 to 74368
75+251

Jefferson County, Montana Veterans by Age

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Name Veterans % of Total
White1,17412.92%
Native American1016.95%
2+ Races196.23%
Hispanic32.22%

Jefferson County, Montana Veterans by Race

Jefferson County, Montana Veterans by Education

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1.10%

Veteran Poverty Rate

44.42%

Veteran Disability Rate

Jefferson County, Montana Veterans by Education

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58.4%

Labor Force Participation

56.4%

Employment Rate

3.4%

Unemployment Rate

Jefferson County, Montana Employment by Age

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Jefferson County, Montana Employment by Race

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Jefferson County, Montana Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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51.26%

Born in Jefferson County, Montana

98.48%

Native Born

1.52%

Foreign Born

0.70%

Non Citizen

0.81%

Naturalized

Place of Birth

98.48% of Jefferson County, Montana residents were born in the United States, with 51.26% having been born in Montana. 0.70% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Jefferson County, Montana Place of Birth

  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

Sources