DeKalb County, Illinois demographics
Population: 100,922
Median age: 31.4
Median household income: 64,019
Demographics, population, home values, social and economic characteristics of DeKalb County, Illinois.
Population
| 2021 | 100,922 |
| 2020 | 104,588 |
| 2019 | 104,366 |
| 2018 | 104,200 |
| 2017 | 104,473 |
| 2016 | 104,458 |
| 2015 | 104,345 |
| 2014 | 104,919 |
| 2013 | 104,820 |
| 2012 | 104,820 |
| 2011 | 104,684 |
| 2010 | 104,026 |
| 2009 | 104,279 |
DeKalb County, IL cities
Cortland town - 4,436
DeKalb city - 41,083
Genoa city - 5,139
Hinckley village - 2,228
Kingston village - 1,312
Kirkland village - 1,592
Lee village - 333
Malta village - 1,491
Maple Park village - 1,775
Sandwich city - 7,182
Shabbona village - 881
Somonauk village - 1,757
Sycamore city - 18,144
Waterman village - 1,602
Census data for DeKalb County, Illinois
Demographic and housing estimates in DeKalb County, Illinois
| Total population | 100,922 |
| Male | 50,067 |
| Female | 50,855 |
| Total population | 100,922 |
| Under 5 years | 5,775 |
| 5 to 9 years | 5,628 |
| 10 to 14 years | 6,723 |
| 15 to 19 years | 8,856 |
| 20 to 24 years | 14,148 |
| 25 to 34 years | 13,516 |
| 35 to 44 years | 11,625 |
| 45 to 54 years | 10,703 |
| 55 to 59 years | 6,116 |
| 60 to 64 years | 5,070 |
| 65 to 74 years | 7,764 |
| 75 to 84 years | 3,502 |
| 85 years and over | 1,496 |
| Median age (years) | 31.4 |
| Under 18 years | 21,885 |
| 16 years and over | 81,414 |
| 18 years and over | 79,037 |
| 21 years and over | 70,611 |
| 62 years and over | 15,758 |
| 65 years and over | 12,762 |
| Total population | 100,922 |
| One race | 96,186 |
| White | 81,826 |
| Black or African American | 7,964 |
| American Indian and Alaska Native | 200 |
| Asian | 2,311 |
| Native Hawaiian and Other Pacific Islander | 26 |
| Some other race | 3,859 |
| Two or more races | 4,736 |
| Citizen, VOTING AGE 18 and over population | 74,873 |
| Male Citizen, VOTING AGE 18 and over population | 36,565 |
| Female Citizen, VOTING AGE 18 and over population | 38,308 |
Social characteristics in DeKalb County, Illinois
| Total households | 38,931 |
| Family households (families) | 17,086 |
| Married-couple family | 3,605 |
| Male householder, no wife present, family | 7,845 |
| Female householder, no husband present, family | 5,561 |
| Nonfamily households | 10,395 |
| Average household size | 8,944 |
| Average family size | 2.48 |
Economic characteristics in DeKalb County, Illinois
| Total households | 38,931 |
| Less than $10,000 | 3,016 |
| $10,000 to $14,999 | 1,419 |
| $15,000 to $24,999 | 3,202 |
| $25,000 to $34,999 | 3,550 |
| $35,000 to $49,999 | 4,215 |
| $50,000 to $74,999 | 7,372 |
| $75,000 to $99,999 | 4,862 |
| $100,000 to $149,999 | 6,203 |
| $150,000 to $199,999 | 3,126 |
| $200,000 or more | 1,966 |
| Median household income (dollars) | 64,019 |
Housing characteristics in DeKalb County, Illinois
| Total housing units | 41,289 |
| Occupied housing units | 38,931 |
| Vacant housing units | 2,358 |
| Total housing units | 41,289 |
| 1-unit, detached | 23,696 |
| 1-unit, attached | 3,991 |
| 2 units | 1,355 |
| 3 or 4 units | 2,237 |
| 5 to 9 units | 4,008 |
| 10 to 19 units | 2,089 |
| 20 or more units | 3,170 |
| Mobile home | 716 |
| Boat, RV, van, etc. | 27 |
| Total housing units | 41,289 |
| Built 2014 or later | 24 |
| Built 2010 to 2013 | 977 |
| Built 2000 to 2009 | 8,341 |
| Built 1990 to 1999 | 6,660 |
| Built 1980 to 1989 | 3,233 |
| Built 1970 to 1979 | 7,003 |
| Built 1960 to 1969 | 4,324 |
| Built 1950 to 1959 | 2,752 |
| Built 1940 to 1949 | 1,201 |
| Built 1939 or earlier | 6,774 |
| Total housing units | 41,289 |
| 1 room | 1,019 |
| 2 rooms | 1,157 |
| 3 rooms | 2,996 |
| 4 rooms | 7,394 |
| 5 rooms | 7,146 |
| 6 rooms | 7,347 |
| 7 rooms | 4,962 |
| 8 rooms | 3,935 |
| 9 rooms or more | 5,333 |
| Median rooms | 5.6 |
| Total housing units | 41,289 |
| No bedroom | 1,082 |
| 1 bedroom | 4,107 |
| 2 bedrooms | 10,535 |
| 3 bedrooms | 16,584 |
| 4 bedrooms | 7,205 |
| 5 or more bedrooms | 1,776 |
| Occupied housing units | 38,931 |
| Owner-occupied | 22,489 |
| Renter-occupied | 16,442 |
| Average household size of owner-occupied unit | 2.70 |
| Average household size of renter-occupied unit | 2.19 |
| Occupied housing units | 38,931 |
| Moved in 2017 or later | 4,241 |
| Moved in 2015 to 2016 | 13,216 |
| Moved in 2010 to 2014 | 6,063 |
| Moved in 2000 to 2009 | 8,117 |
| Moved in 1990 to 1999 | 3,829 |
| Moved in 1989 and earlier | 3,465 |
| Owner-occupied units | 22,489 |
| Less than $50,000 | 781 |
| $50,000 to $99,999 | 1,041 |
| $100,000 to $149,999 | 4,247 |
| $150,000 to $199,999 | 6,193 |
| $200,000 to $299,999 | 6,834 |
| $300,000 to $499,999 | 2,855 |
| $500,000 to $999,999 | 446 |
| $1,000,000 or more | 92 |
| Median (dollars) | 190,600 |
| Owner-occupied units | 22,489 |
| Housing units with a mortgage | 15,367 |
| Housing units without a mortgage | 7,122 |
| Occupied units paying rent | 16,008 |
| Less than $500 | 1,205 |
| $500 to $999 | 7,720 |
| $1,000 to $1,499 | 4,898 |
| $1,500 to $1,999 | 1,533 |
| $2,000 to $2,499 | 509 |
| $2,500 to $2,999 | 75 |
| $3,000 or more | 68 |
| Median (dollars) | 955 |
| No rent paid | 434 |
Demographic data for DeKalb County, IL and each city in the county. Lists of cities by population, wealth and poverty in DeKalb County, IL.
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