Jefferson County, Illinois demographics
Population: 37,362
Median age: 41.2
Median household income: 54,692
Demographics, population, home values, social and economic characteristics of Jefferson County, Illinois.
Population
| 2021 | 37,362 |
| 2020 | 37,774 |
| 2019 | 37,985 |
| 2018 | 38,169 |
| 2017 | 38,358 |
| 2016 | 38,523 |
| 2015 | 38,578 |
| 2014 | 38,716 |
| 2013 | 38,769 |
| 2012 | 38,908 |
| 2011 | 39,032 |
| 2010 | 39,202 |
| 2009 | 40,063 |
Jefferson County, IL cities
Belle Rive village - 349
Bluford village - 536
Bonnie village - 385
Centralia city - 12,061
Dix village - 520
Ina village - 2,015
Mount Vernon city - 14,614
Nason city - 207
Opdyke CDP - 262
Waltonville village - 355
Woodlawn village - 647
Census data for Jefferson County, Illinois
Demographic and housing estimates in Jefferson County, Illinois
| Total population | 37,362 |
| Male | 19,409 |
| Female | 17,953 |
| Total population | 37,362 |
| Under 5 years | 2,270 |
| 5 to 9 years | 2,458 |
| 10 to 14 years | 2,233 |
| 15 to 19 years | 2,197 |
| 20 to 24 years | 2,040 |
| 25 to 34 years | 4,631 |
| 35 to 44 years | 4,625 |
| 45 to 54 years | 4,785 |
| 55 to 59 years | 2,581 |
| 60 to 64 years | 2,436 |
| 65 to 74 years | 4,164 |
| 75 to 84 years | 2,164 |
| 85 years and over | 778 |
| Median age (years) | 41.2 |
| Under 18 years | 8,387 |
| 16 years and over | 30,027 |
| 18 years and over | 28,975 |
| 21 years and over | 27,856 |
| 62 years and over | 8,409 |
| 65 years and over | 7,106 |
| Total population | 37,362 |
| One race | 35,834 |
| White | 32,125 |
| Black or African American | 3,065 |
| American Indian and Alaska Native | 68 |
| Asian | 410 |
| Native Hawaiian and Other Pacific Islander | 8 |
| Some other race | 158 |
| Two or more races | 1,528 |
| Citizen, VOTING AGE 18 and over population | 28,727 |
| Male Citizen, VOTING AGE 18 and over population | 14,910 |
| Female Citizen, VOTING AGE 18 and over population | 13,817 |
Social characteristics in Jefferson County, Illinois
| Total households | 14,608 |
| Family households (families) | 6,896 |
| Married-couple family | 1,073 |
| Male householder, no wife present, family | 2,731 |
| Female householder, no husband present, family | 2,090 |
| Nonfamily households | 3,908 |
| Average household size | 4,816 |
| Average family size | 2.42 |
Economic characteristics in Jefferson County, Illinois
| Total households | 14,608 |
| Less than $10,000 | 858 |
| $10,000 to $14,999 | 796 |
| $15,000 to $24,999 | 1,491 |
| $25,000 to $34,999 | 1,441 |
| $35,000 to $49,999 | 2,134 |
| $50,000 to $74,999 | 2,753 |
| $75,000 to $99,999 | 2,059 |
| $100,000 to $149,999 | 1,942 |
| $150,000 to $199,999 | 518 |
| $200,000 or more | 616 |
| Median household income (dollars) | 54,692 |
Housing characteristics in Jefferson County, Illinois
| Total housing units | 16,657 |
| Occupied housing units | 14,608 |
| Vacant housing units | 2,049 |
| Total housing units | 16,657 |
| 1-unit, detached | 11,597 |
| 1-unit, attached | 101 |
| 2 units | 204 |
| 3 or 4 units | 502 |
| 5 to 9 units | 529 |
| 10 to 19 units | 369 |
| 20 or more units | 511 |
| Mobile home | 2,826 |
| Boat, RV, van, etc. | 18 |
| Total housing units | 16,657 |
| Built 2014 or later | 13 |
| Built 2010 to 2013 | 748 |
| Built 2000 to 2009 | 1,880 |
| Built 1990 to 1999 | 2,604 |
| Built 1980 to 1989 | 1,855 |
| Built 1970 to 1979 | 2,942 |
| Built 1960 to 1969 | 1,468 |
| Built 1950 to 1959 | 1,945 |
| Built 1940 to 1949 | 1,102 |
| Built 1939 or earlier | 2,100 |
| Total housing units | 16,657 |
| 1 room | 167 |
| 2 rooms | 293 |
| 3 rooms | 1,224 |
| 4 rooms | 2,214 |
| 5 rooms | 3,962 |
| 6 rooms | 3,508 |
| 7 rooms | 2,127 |
| 8 rooms | 1,287 |
| 9 rooms or more | 1,875 |
| Median rooms | 5.6 |
| Total housing units | 16,657 |
| No bedroom | 191 |
| 1 bedroom | 1,300 |
| 2 bedrooms | 5,139 |
| 3 bedrooms | 7,390 |
| 4 bedrooms | 2,093 |
| 5 or more bedrooms | 544 |
| Occupied housing units | 14,608 |
| Owner-occupied | 10,455 |
| Renter-occupied | 4,153 |
| Average household size of owner-occupied unit | 2.58 |
| Average household size of renter-occupied unit | 2.04 |
| Occupied housing units | 14,608 |
| Moved in 2017 or later | 1,186 |
| Moved in 2015 to 2016 | 3,753 |
| Moved in 2010 to 2014 | 2,298 |
| Moved in 2000 to 2009 | 3,164 |
| Moved in 1990 to 1999 | 1,982 |
| Moved in 1989 and earlier | 2,225 |
| Owner-occupied units | 10,455 |
| Less than $50,000 | 2,041 |
| $50,000 to $99,999 | 3,091 |
| $100,000 to $149,999 | 1,939 |
| $150,000 to $199,999 | 1,558 |
| $200,000 to $299,999 | 1,307 |
| $300,000 to $499,999 | 399 |
| $500,000 to $999,999 | 93 |
| $1,000,000 or more | 27 |
| Median (dollars) | 102,200 |
| Owner-occupied units | 10,455 |
| Housing units with a mortgage | 5,193 |
| Housing units without a mortgage | 5,262 |
| Occupied units paying rent | 3,741 |
| Less than $500 | 919 |
| $500 to $999 | 2,112 |
| $1,000 to $1,499 | 577 |
| $1,500 to $1,999 | 105 |
| $2,000 to $2,499 | 0 |
| $2,500 to $2,999 | 0 |
| $3,000 or more | 28 |
| Median (dollars) | 753 |
| No rent paid | 412 |
Demographic data for Jefferson County, IL and each city in the county. Lists of cities by population, wealth and poverty in Jefferson County, IL.
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