Jefferson County, Idaho demographics
Population: 30,427
Median age: 31.9
Median household income: 69,097
Demographics, population, home values, social and economic characteristics of Jefferson County, Idaho.
Population
| 2021 | 30,427 |
| 2020 | 29,238 |
| 2019 | 28,534 |
| 2018 | 27,969 |
| 2017 | 27,410 |
| 2016 | 27,096 |
| 2015 | 26,792 |
| 2014 | 26,620 |
| 2013 | 26,389 |
| 2012 | 25,940 |
| 2011 | 25,291 |
| 2010 | 24,523 |
| 2009 | 22,892 |
Jefferson County, ID cities
Hamer city - 37
Lewisville city - 488
Menan city - 902
Mud Lake city - 416
Rigby city - 4,920
Ririe city - 666
Roberts city - 425
Census data for Jefferson County, Idaho
Demographic and housing estimates in Jefferson County, Idaho
| Total population | 30,427 |
| Male | 15,435 |
| Female | 14,992 |
| Total population | 30,427 |
| Under 5 years | 2,463 |
| 5 to 9 years | 2,798 |
| 10 to 14 years | 3,309 |
| 15 to 19 years | 2,591 |
| 20 to 24 years | 1,756 |
| 25 to 34 years | 3,483 |
| 35 to 44 years | 4,190 |
| 45 to 54 years | 3,210 |
| 55 to 59 years | 1,551 |
| 60 to 64 years | 1,685 |
| 65 to 74 years | 2,194 |
| 75 to 84 years | 878 |
| 85 years and over | 319 |
| Median age (years) | 31.9 |
| Under 18 years | 10,338 |
| 16 years and over | 21,317 |
| 18 years and over | 20,089 |
| 21 years and over | 18,835 |
| 62 years and over | 4,419 |
| 65 years and over | 3,391 |
| Total population | 30,427 |
| One race | 28,939 |
| White | 27,098 |
| Black or African American | 21 |
| American Indian and Alaska Native | 239 |
| Asian | 89 |
| Native Hawaiian and Other Pacific Islander | 0 |
| Some other race | 1,492 |
| Two or more races | 1,488 |
| Citizen, VOTING AGE 18 and over population | 19,324 |
| Male Citizen, VOTING AGE 18 and over population | 9,867 |
| Female Citizen, VOTING AGE 18 and over population | 9,457 |
Social characteristics in Jefferson County, Idaho
| Total households | 9,345 |
| Family households (families) | 6,810 |
| Married-couple family | 433 |
| Male householder, no wife present, family | 858 |
| Female householder, no husband present, family | 670 |
| Nonfamily households | 1,244 |
| Average household size | 2,314 |
| Average family size | 3.25 |
Economic characteristics in Jefferson County, Idaho
| Total households | 9,345 |
| Less than $10,000 | 384 |
| $10,000 to $14,999 | 104 |
| $15,000 to $24,999 | 508 |
| $25,000 to $34,999 | 779 |
| $35,000 to $49,999 | 1,054 |
| $50,000 to $74,999 | 2,279 |
| $75,000 to $99,999 | 1,544 |
| $100,000 to $149,999 | 1,752 |
| $150,000 to $199,999 | 425 |
| $200,000 or more | 516 |
| Median household income (dollars) | 69,097 |
Housing characteristics in Jefferson County, Idaho
| Total housing units | 9,953 |
| Occupied housing units | 9,345 |
| Vacant housing units | 608 |
| Total housing units | 9,953 |
| 1-unit, detached | 8,360 |
| 1-unit, attached | 272 |
| 2 units | 52 |
| 3 or 4 units | 241 |
| 5 to 9 units | 89 |
| 10 to 19 units | 33 |
| 20 or more units | 47 |
| Mobile home | 859 |
| Boat, RV, van, etc. | 0 |
| Total housing units | 9,953 |
| Built 2014 or later | 24 |
| Built 2010 to 2013 | 1,231 |
| Built 2000 to 2009 | 2,503 |
| Built 1990 to 1999 | 904 |
| Built 1980 to 1989 | 986 |
| Built 1970 to 1979 | 1,644 |
| Built 1960 to 1969 | 566 |
| Built 1950 to 1959 | 550 |
| Built 1940 to 1949 | 486 |
| Built 1939 or earlier | 1,059 |
| Total housing units | 9,953 |
| 1 room | 80 |
| 2 rooms | 34 |
| 3 rooms | 342 |
| 4 rooms | 910 |
| 5 rooms | 1,628 |
| 6 rooms | 1,298 |
| 7 rooms | 969 |
| 8 rooms | 1,195 |
| 9 rooms or more | 3,497 |
| Median rooms | 7.2 |
| Total housing units | 9,953 |
| No bedroom | 92 |
| 1 bedroom | 250 |
| 2 bedrooms | 1,294 |
| 3 bedrooms | 3,660 |
| 4 bedrooms | 2,149 |
| 5 or more bedrooms | 2,508 |
| Occupied housing units | 9,345 |
| Owner-occupied | 7,700 |
| Renter-occupied | 1,645 |
| Average household size of owner-occupied unit | 3.32 |
| Average household size of renter-occupied unit | 2.91 |
| Occupied housing units | 9,345 |
| Moved in 2017 or later | 807 |
| Moved in 2015 to 2016 | 2,202 |
| Moved in 2010 to 2014 | 1,717 |
| Moved in 2000 to 2009 | 2,387 |
| Moved in 1990 to 1999 | 913 |
| Moved in 1989 and earlier | 1,319 |
| Owner-occupied units | 7,700 |
| Less than $50,000 | 409 |
| $50,000 to $99,999 | 496 |
| $100,000 to $149,999 | 1,087 |
| $150,000 to $199,999 | 887 |
| $200,000 to $299,999 | 2,306 |
| $300,000 to $499,999 | 1,694 |
| $500,000 to $999,999 | 757 |
| $1,000,000 or more | 64 |
| Median (dollars) | 245,100 |
| Owner-occupied units | 7,700 |
| Housing units with a mortgage | 4,835 |
| Housing units without a mortgage | 2,865 |
| Occupied units paying rent | 1,354 |
| Less than $500 | 58 |
| $500 to $999 | 971 |
| $1,000 to $1,499 | 262 |
| $1,500 to $1,999 | 54 |
| $2,000 to $2,499 | 9 |
| $2,500 to $2,999 | 0 |
| $3,000 or more | 0 |
| Median (dollars) | 890 |
| No rent paid | 291 |
Demographic data for Jefferson County, ID and each city in the county. Lists of cities by population, wealth and poverty in Jefferson County, ID.
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