Jefferson County, Montana demographics
Population: 12,057
Median age: 47.5
Median household income: 72,500
Demographics, population, home values, social and economic characteristics of Jefferson County, Montana.
Population
| 2021 | 12,057 |
| 2020 | 12,069 |
| 2019 | 11,917 |
| 2018 | 11,778 |
| 2017 | 11,625 |
| 2016 | 11,601 |
| 2015 | 11,502 |
| 2014 | 11,465 |
| 2013 | 11,434 |
| 2012 | 11,360 |
| 2011 | 11,281 |
| 2010 | 11,166 |
| 2009 | 11,105 |
Jefferson County, MT cities
Basin CDP - 366
Boulder city - 1,033
Cardwell CDP - 35
Clancy CDP - 1,902
Elkhorn CDP - 0
Jefferson City CDP - 438
Montana City CDP - 2,735
Rader Creek CDP - 338
South Hills CDP - 669
Whitehall town - 966
Census data for Jefferson County, Montana
Demographic and housing estimates in Jefferson County, Montana
| Total population | 12,057 |
| Male | 6,155 |
| Female | 5,902 |
| Total population | 12,057 |
| Under 5 years | 508 |
| 5 to 9 years | 687 |
| 10 to 14 years | 755 |
| 15 to 19 years | 718 |
| 20 to 24 years | 621 |
| 25 to 34 years | 1,012 |
| 35 to 44 years | 1,337 |
| 45 to 54 years | 1,641 |
| 55 to 59 years | 1,015 |
| 60 to 64 years | 1,127 |
| 65 to 74 years | 1,844 |
| 75 to 84 years | 577 |
| 85 years and over | 215 |
| Median age (years) | 47.5 |
| Under 18 years | 2,470 |
| 16 years and over | 9,939 |
| 18 years and over | 9,587 |
| 21 years and over | 9,247 |
| 62 years and over | 3,267 |
| 65 years and over | 2,636 |
| Total population | 12,057 |
| One race | 11,521 |
| White | 11,259 |
| Black or African American | 54 |
| American Indian and Alaska Native | 141 |
| Asian | 17 |
| Native Hawaiian and Other Pacific Islander | 0 |
| Some other race | 50 |
| Two or more races | 536 |
| Citizen, VOTING AGE 18 and over population | 9,520 |
| Male Citizen, VOTING AGE 18 and over population | 4,864 |
| Female Citizen, VOTING AGE 18 and over population | 4,656 |
Social characteristics in Jefferson County, Montana
| Total households | 4,604 |
| Family households (families) | 3,072 |
| Married-couple family | 137 |
| Male householder, no wife present, family | 735 |
| Female householder, no husband present, family | 525 |
| Nonfamily households | 660 |
| Average household size | 1,705 |
| Average family size | 2.56 |
Economic characteristics in Jefferson County, Montana
| Total households | 4,604 |
| Less than $10,000 | 166 |
| $10,000 to $14,999 | 92 |
| $15,000 to $24,999 | 336 |
| $25,000 to $34,999 | 414 |
| $35,000 to $49,999 | 510 |
| $50,000 to $74,999 | 884 |
| $75,000 to $99,999 | 606 |
| $100,000 to $149,999 | 843 |
| $150,000 to $199,999 | 453 |
| $200,000 or more | 300 |
| Median household income (dollars) | 72,500 |
Housing characteristics in Jefferson County, Montana
| Total housing units | 5,341 |
| Occupied housing units | 4,604 |
| Vacant housing units | 737 |
| Total housing units | 5,341 |
| 1-unit, detached | 4,514 |
| 1-unit, attached | 132 |
| 2 units | 38 |
| 3 or 4 units | 13 |
| 5 to 9 units | 48 |
| 10 to 19 units | 25 |
| 20 or more units | 24 |
| Mobile home | 497 |
| Boat, RV, van, etc. | 50 |
| Total housing units | 5,341 |
| Built 2014 or later | 15 |
| Built 2010 to 2013 | 415 |
| Built 2000 to 2009 | 1,006 |
| Built 1990 to 1999 | 1,070 |
| Built 1980 to 1989 | 606 |
| Built 1970 to 1979 | 1,016 |
| Built 1960 to 1969 | 227 |
| Built 1950 to 1959 | 230 |
| Built 1940 to 1949 | 121 |
| Built 1939 or earlier | 635 |
| Total housing units | 5,341 |
| 1 room | 159 |
| 2 rooms | 126 |
| 3 rooms | 348 |
| 4 rooms | 531 |
| 5 rooms | 852 |
| 6 rooms | 678 |
| 7 rooms | 803 |
| 8 rooms | 678 |
| 9 rooms or more | 1,166 |
| Median rooms | 6.5 |
| Total housing units | 5,341 |
| No bedroom | 183 |
| 1 bedroom | 528 |
| 2 bedrooms | 882 |
| 3 bedrooms | 2,018 |
| 4 bedrooms | 1,246 |
| 5 or more bedrooms | 484 |
| Occupied housing units | 4,604 |
| Owner-occupied | 3,870 |
| Renter-occupied | 734 |
| Average household size of owner-occupied unit | 2.60 |
| Average household size of renter-occupied unit | 2.33 |
| Occupied housing units | 4,604 |
| Moved in 2017 or later | 411 |
| Moved in 2015 to 2016 | 1,075 |
| Moved in 2010 to 2014 | 562 |
| Moved in 2000 to 2009 | 1,230 |
| Moved in 1990 to 1999 | 740 |
| Moved in 1989 and earlier | 586 |
| Owner-occupied units | 3,870 |
| Less than $50,000 | 150 |
| $50,000 to $99,999 | 171 |
| $100,000 to $149,999 | 268 |
| $150,000 to $199,999 | 305 |
| $200,000 to $299,999 | 1,011 |
| $300,000 to $499,999 | 1,379 |
| $500,000 to $999,999 | 554 |
| $1,000,000 or more | 32 |
| Median (dollars) | 304,300 |
| Owner-occupied units | 3,870 |
| Housing units with a mortgage | 2,184 |
| Housing units without a mortgage | 1,686 |
| Occupied units paying rent | 508 |
| Less than $500 | 99 |
| $500 to $999 | 200 |
| $1,000 to $1,499 | 148 |
| $1,500 to $1,999 | 40 |
| $2,000 to $2,499 | 9 |
| $2,500 to $2,999 | 0 |
| $3,000 or more | 12 |
| Median (dollars) | 798 |
| No rent paid | 226 |
Demographic data for Jefferson County, MT and each city in the county. Lists of cities by population, wealth and poverty in Jefferson County, MT.
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