Jefferson County, Montana Population 2019

Jefferson County, Montana's estimated population is 11,937 with a growth rate of 1.35% in the past year according to the most recent United States census data. Jefferson County, Montana is the 15th largest county in Montana.

Year Population Growth Growth Rate
201812,0971601.34%
201711,9371591.35%
201611,7782041.76%
201511,574720.63%
201411,502460.40%
201311,4561381.22%
201211,318-57-0.50%
201111,375-33-0.29%
201011,4083,46943.70%
19907,93991012.95%
19807,0291,79134.19%
19705,23894121.90%
19604,2972837.05%
19504,014-650-13.94%
19404,66453112.85%
19304,133-1,070-20.57%
19205,203-398-7.11%
19105,6012715.08%
19005,330-696-11.55%
18906,0263,562144.56%
18802,46493360.94%
18701,5310.00%

Jefferson County, Montana Population Growth

Population Data via

Population by Race

Race Population
White11,010
Two or More Races370
American Indian and Alaska Native168
Some Other Race47
Asian24
Black or African American6

Jefferson County, Montana Population Pyramid 2019

Jefferson County, Montana Median Age

47.9


Total

48.1


Male

47.8


Female

Jefferson County, Montana Adults

There are 9,185 adults, (2,221 of whom are seniors) in Jefferson County, Montana.

Jefferson County, Montana Age Dependency

66.9

Age Dependency Ratio

31.9

Old Age Dependency Ratio

35

Child Dependency Ratio

Jefferson County, Montana Sex Ratio

Female

5,670

48.77%

Male

5,955

51.23%

Jefferson County, Montana Households and Families

Jefferson County, Montana Renter vs Owner Occupied by Household Type

Jefferson County, Montana Household Types

Type Owner Renter
Married92.4%7.6%
Male85.8%14.2%
All85.1%14.9%
Non Family74.8%25.2%
Female62%38%

85.1%

Rate of Home Ownership

Type Count Average Size Owned
All4,5122.5285.1
Married2,7242.9192.4
Non Family1,2971.2274.8
Female2873.4362
Male2044.285.8

2.96

Average Family Size

2.52

Average Household Size

5.1%

Unmarried (Opposite Sex)

0.4%

Unmarried (Same Sex)

Jefferson County, Montana Education

Education Attained Count Percentage
Less Than 9th Grade1681.99%
9th to 12th Grade2693.19%
High School Graduate2,38228.24%
Some College2,04024.18%
Associates Degree8039.52%
Bachelors Degree1,96323.27%
Graduate Degree8109.60%

Jefferson County, Montana Educational Attainment by Race

Name Total High School Bachelors
White7,9657,6022,675
Multiple Races19819752
Hispanic14213243
Native American12663
Asian11111
Other Race888
Black66

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 other race people with a rate of 100.00%.

Name Average Male Female
Overall$38,626$48,507$31,434
Less Than High School$17,063$28,382$10,938
High School Grad$30,447$35,929$21,354
Some College$37,500$45,625$30,257
Bachelors Degree$42,571$54,922$35,847
Graduate Degree$74,712$79,948$65,167

$38,626

Average Earnings

$48,507

Average Male

$31,434

Average Female

Jefferson County, Montana Language

Jefferson County, Montana Language by Age

Jefferson County, Montana Language

97.87% of Jefferson County, Montana residents speak only English, while 2.13% speak other languages. The non-English language spoken by the largest group is Other Indo-European, which is spoken by 1.10% of the population.

Jefferson County, Montana Poverty

Jefferson County, Montana Poverty by Race

Name Total In Poverty Poverty Rate
White10,6931,0369.69%
Hispanic2586525.19%
Multiple3694411.92%
Native12653.97%

9.94%

Overall Poverty Rate

8.86%

Male Poverty Rate

11.09%

Female Poverty Rate

Poverty in Jefferson County, Montana

The race most likely to be in poverty in Jefferson County, Montana is Hispanic, with 25.19% below the poverty level.

The race least likely to be in poverty in Jefferson County, Montana is Native, with 3.97% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 5.14%. Among those working part-time, it was 8.47%, and for those that did not work, the poverty rate was 15.11%.

Name Poverty
High School15.76%
Less Than High School14.89%
Some College6.59%
Bachelors or Greater3.76%
Name Poverty
Male Unemployed17.20%
Male Employed7.75%
Female Unemployed6.06%
Female Employed5.61%

Jefferson County, Montana Income

Jefferson County, Montana Income by Household Type

Name Median Mean
Households$64,911$80,622
Families$78,003$92,752
Married Families$83,462-
Non Families$37,264$46,926

Jefferson County, Montana Marital Status

Jefferson County, Montana Marital Status

Marriage Rates

58.8%

Overall Marriage Rate

58.6%

Male Marriage Rate

59.0%

Female Marriage Rate

Jefferson County, Montana Married by Age and Sex

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

Jefferson County, Montana Veterans

1,174

Number of Veterans

1,084

Male Veterans

90

Female Veterans

War Veterans
Vietnam638
First Gulf War275
Second Gulf War140
Korea94
World War II11

Jefferson County, Montana Veterans by Race

Name Veterans % of Total
White1,07412.24%
Indian5241.27%
2 or More4820.17%

Jefferson County, Montana Veterans by Education

2.95%

Veteran Poverty Rate

31.25%

Veteran Disability Rate

Jefferson County, Montana Employment Status

58.9%

Labor Force Participation

55.3%

Employment Rate

5.7%

Unemployment Rate

Population of Cities in Jefferson County, Montana

City 2010 Census 2016 Estimated Growth Growth Rate
Boulder11791230514.33%
Whitehall10441114706.70%
  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