Knox County, Illinois demographics
Population: 50,193
Median age: 41.8
Median household income: 45,994
Demographics, population, home values, social and economic characteristics of Knox County, Illinois.
Population
| 2021 | 50,193 |
| 2020 | 50,052 |
| 2019 | 50,508 |
| 2018 | 50,999 |
| 2017 | 51,374 |
| 2016 | 51,752 |
| 2015 | 52,112 |
| 2014 | 52,447 |
| 2013 | 52,545 |
| 2012 | 52,698 |
| 2011 | 52,881 |
| 2010 | 52,932 |
| 2009 | 52,077 |
Knox County, IL cities
Abingdon city - 3,586
Altona village - 602
East Galesburg village - 595
Galesburg city - 30,298
Gilson CDP - 171
Henderson village - 249
Knoxville city - 3,258
London Mills village - 365
Maquon village - 206
Oak Run CDP - 630
Oneida city - 787
Rio village - 199
St. Augustine village - 125
Victoria village - 274
Wataga village - 726
Williamsfield village - 489
Yates City village - 711
Census data for Knox County, Illinois
Demographic and housing estimates in Knox County, Illinois
| Total population | 50,193 |
| Male | 25,526 |
| Female | 24,667 |
| Total population | 50,193 |
| Under 5 years | 2,814 |
| 5 to 9 years | 2,717 |
| 10 to 14 years | 2,762 |
| 15 to 19 years | 3,415 |
| 20 to 24 years | 3,601 |
| 25 to 34 years | 5,554 |
| 35 to 44 years | 5,819 |
| 45 to 54 years | 5,790 |
| 55 to 59 years | 3,457 |
| 60 to 64 years | 3,566 |
| 65 to 74 years | 6,148 |
| 75 to 84 years | 3,327 |
| 85 years and over | 1,223 |
| Median age (years) | 41.8 |
| Under 18 years | 10,042 |
| 16 years and over | 41,240 |
| 18 years and over | 40,151 |
| 21 years and over | 37,471 |
| 62 years and over | 12,649 |
| 65 years and over | 10,698 |
| Total population | 50,193 |
| One race | 48,499 |
| White | 42,575 |
| Black or African American | 4,416 |
| American Indian and Alaska Native | 45 |
| Asian | 518 |
| Native Hawaiian and Other Pacific Islander | 0 |
| Some other race | 945 |
| Two or more races | 1,694 |
| Citizen, VOTING AGE 18 and over population | 38,999 |
| Male Citizen, VOTING AGE 18 and over population | 19,595 |
| Female Citizen, VOTING AGE 18 and over population | 19,404 |
Social characteristics in Knox County, Illinois
| Total households | 20,575 |
| Family households (families) | 8,748 |
| Married-couple family | 1,505 |
| Male householder, no wife present, family | 4,367 |
| Female householder, no husband present, family | 3,530 |
| Nonfamily households | 5,955 |
| Average household size | 7,718 |
| Average family size | 2.23 |
Economic characteristics in Knox County, Illinois
| Total households | 20,575 |
| Less than $10,000 | 1,852 |
| $10,000 to $14,999 | 1,220 |
| $15,000 to $24,999 | 2,692 |
| $25,000 to $34,999 | 2,088 |
| $35,000 to $49,999 | 3,021 |
| $50,000 to $74,999 | 3,610 |
| $75,000 to $99,999 | 2,510 |
| $100,000 to $149,999 | 2,340 |
| $150,000 to $199,999 | 766 |
| $200,000 or more | 476 |
| Median household income (dollars) | 45,994 |
Housing characteristics in Knox County, Illinois
| Total housing units | 23,839 |
| Occupied housing units | 20,575 |
| Vacant housing units | 3,264 |
| Total housing units | 23,839 |
| 1-unit, detached | 18,448 |
| 1-unit, attached | 252 |
| 2 units | 744 |
| 3 or 4 units | 870 |
| 5 to 9 units | 828 |
| 10 to 19 units | 737 |
| 20 or more units | 1,064 |
| Mobile home | 896 |
| Boat, RV, van, etc. | 0 |
| Total housing units | 23,839 |
| Built 2014 or later | 0 |
| Built 2010 to 2013 | 470 |
| Built 2000 to 2009 | 804 |
| Built 1990 to 1999 | 1,606 |
| Built 1980 to 1989 | 1,249 |
| Built 1970 to 1979 | 4,281 |
| Built 1960 to 1969 | 1,965 |
| Built 1950 to 1959 | 3,850 |
| Built 1940 to 1949 | 1,074 |
| Built 1939 or earlier | 8,540 |
| Total housing units | 23,839 |
| 1 room | 719 |
| 2 rooms | 249 |
| 3 rooms | 1,522 |
| 4 rooms | 3,441 |
| 5 rooms | 5,050 |
| 6 rooms | 5,068 |
| 7 rooms | 3,182 |
| 8 rooms | 2,455 |
| 9 rooms or more | 2,153 |
| Median rooms | 5.7 |
| Total housing units | 23,839 |
| No bedroom | 738 |
| 1 bedroom | 2,629 |
| 2 bedrooms | 6,939 |
| 3 bedrooms | 9,349 |
| 4 bedrooms | 3,527 |
| 5 or more bedrooms | 657 |
| Occupied housing units | 20,575 |
| Owner-occupied | 13,931 |
| Renter-occupied | 6,644 |
| Average household size of owner-occupied unit | 2.30 |
| Average household size of renter-occupied unit | 2.07 |
| Occupied housing units | 20,575 |
| Moved in 2017 or later | 1,159 |
| Moved in 2015 to 2016 | 5,121 |
| Moved in 2010 to 2014 | 3,974 |
| Moved in 2000 to 2009 | 4,123 |
| Moved in 1990 to 1999 | 2,740 |
| Moved in 1989 and earlier | 3,458 |
| Owner-occupied units | 13,931 |
| Less than $50,000 | 2,211 |
| $50,000 to $99,999 | 6,141 |
| $100,000 to $149,999 | 2,676 |
| $150,000 to $199,999 | 1,153 |
| $200,000 to $299,999 | 1,061 |
| $300,000 to $499,999 | 509 |
| $500,000 to $999,999 | 144 |
| $1,000,000 or more | 36 |
| Median (dollars) | 86,300 |
| Owner-occupied units | 13,931 |
| Housing units with a mortgage | 7,618 |
| Housing units without a mortgage | 6,313 |
| Occupied units paying rent | 6,290 |
| Less than $500 | 1,953 |
| $500 to $999 | 3,654 |
| $1,000 to $1,499 | 569 |
| $1,500 to $1,999 | 87 |
| $2,000 to $2,499 | 21 |
| $2,500 to $2,999 | 0 |
| $3,000 or more | 6 |
| Median (dollars) | 620 |
| No rent paid | 354 |
Demographic data for Knox County, IL and each city in the county. Lists of cities by population, wealth and poverty in Knox County, IL.
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