Department of Numbers

Housing Units, Population and Cost Rank Measures for Illinois

Here we explore the evolution and dynamics of the housing supply in Illinois, the relative cost of Illinois housing, the housing mix and the change in Illinois population. Housing supply here is defined as the number of housing units (i.e: houses, condos, apartments etc..). For this analysis, the Illinois population number we're most interested in is the 18 and over population since the under 18 population typically isn't a buyer or renter in the housing market. All data on this page comes from the Census ACS 1 year survey. Jump to Illinois sections: housing units, housing cost, housing mix, population.

Housing Units and 18+ Population for Illinois

The data below track the total number of housing units in Illinois, the total 18 and over population in Illinois and the ratio of the 18 and over Illinois population to the number of housing units. Over the past 5 years, the number of Illinois housing units increased by 1.52% while the 18 and over population decreased by 0.39%. As a result, the ratio of the 18 and over population to housing units decreased from 1.864 to 1.829. A lower population to housing units ratio means there are more housing units available per person in the region.

2019 1 Year Change 5 Year Change
Illinois Housing Units 5,388,210 +0.22% +1.52%
Illinois 18+ Population 9,857,142 -0.28% -0.39%
Illinois 18+ Pop. / Units 1.829 -0.009 -0.035

Illinois 18+ Population to Units Ratio Trends: Illinois, US

Illinois Housing Units and 18+ Population History

Date Illinois Housing Units Illinois 18+ Population Illinois 18+ Pop. / Units
2019 5,388,210 9,857,142 1.829
2018 5,376,176 9,885,278 1.839
2017 5,359,416 9,906,933 1.848
2016 5,327,165 9,878,820 1.854
2015 5,317,618 9,899,810 1.862
2014 5,307,508 9,895,846 1.864
2013 5,289,653 9,859,980 1.864
2012 5,290,149 9,812,204 1.855
2011 5,296,209 9,772,719 1.845
2010 5,297,077 9,717,236 1.834
2009 5,290,878 9,736,342 1.840
2008 5,276,082 9,720,800 1.842

more history ...

Illinois Relative Housing Cost Percentile by Price and Rent

This data shows where Illinois falls in the distribution of home prices and rent compared to other states (and D.C.). The higher the percentile, the more expensive the region is compared to the rest of the country. In 2019, Illinois was at the 50.98% percentile for home prices and the 56.86% percentile for the cost of rent. Over the past 5 years, Illinois home prices have become less expensive compared to the rest of the country and rent in Illinois has become less expensive over the past 5 years relative to the rest of the country.

Illinois Home Price and Rent Percentile

2019 1 Year Change
(delta)		 5 Year Change
(delta)
Illinois Home Price Percentile 50.98% 0.00% -1.96%
Illinois Rent Percentile 56.86% 0.00% -3.92%

Illinois Trends in Home Price and Rent Percentile: Illinois, US

Illinois Home Price and Rent Percentile History

Date Illinois Home Price Percentile Illinois Rent Percentile
2019 50.98% 56.86%
2018 50.98% 56.86%
2017 50.98% 60.78%
2016 50.98% 60.78%
2015 50.98% 64.71%
2014 52.94% 60.78%
2013 56.86% 62.75%
2012 56.86% 64.71%
2011 58.82% 66.67%
2010 62.75% 66.67%
2009 62.75% 62.75%
2008 60.78% 64.71%

more history ...

Illinois Housing Units: Owner Occupied, Renter Occupied and Vacant

The data below shows the number of housing units in Illinois by type. Over the past 5 years, the number of housing units held by owner occupiers increased by 2.76% while the total number of rented units in Illinois increased by 0.45%. Units that were vacant1 decreased by 2.41% over the last 5 years.

Illinois Changes in Owned, Rented and Vacant Units

2019 1 Year Change 5 Year Change
Illinois Owner Occ. Units 3,211,867 +0.05% +2.76%
Illinois Renter Occ. Units 1,654,139 -0.04% +0.45%
Illinois Vacant Units 522,204 +2.13% -2.41%

Illinois Housing Share Trends: Owned, Rented and Vacant: Owned, Rented, Vacant

The chart below shows the share of each housing type in Illinois as a fraction of total housing units.

Illinois Owned, Rented and Vacant Units History

Date Illinois Owner Occ. Units Illinois Renter Occ. Units Illinois Vacant Units
2019 3,211,867 1,654,139 522,204
2018 3,210,113 1,654,751 511,312
2017 3,182,232 1,626,440 550,744
2016 3,146,858 1,675,188 505,119
2015 3,129,641 1,664,882 523,095
2014 3,125,655 1,646,766 535,087
2013 3,154,027 1,629,394 506,232
2012 3,177,104 1,593,090 519,955
2011 3,190,282 1,546,926 559,001
2010 3,219,338 1,533,519 544,220
2009 3,235,065 1,522,387 533,426
2008 3,301,796 1,464,456 509,830

more history ...

Illinois Population

This data shows the population of Illinois for the under 18 category and the 18 and over category. In the last 5 years the under 18 population has decreased by 5.70% while the 18 and over population has decreased by 0.39%.The total population of Illinois has decreased by 1.62% in the last 5 years.

Changes in Illinois Population

2019 1 Year Change 5 Year Change
Illinois Population Under 18 2,814,679 -1.44% -5.70%
Illinois Population 18+ 9,857,142 -0.28% -0.39%
Illinois Total Population 12,671,821 -0.54% -1.62%

Illinois Population Age Share: Under 18, 18 and Over: 18+, Under 18

Illinois Population History

Date Illinois Population Under 18 Illinois Population 18+ Illinois Total Population
2019 2,814,679 9,857,142 12,671,821
2018 2,855,802 9,885,278 12,741,080
2017 2,895,090 9,906,933 12,802,023
2016 2,922,719 9,878,820 12,801,539
2015 2,960,185 9,899,810 12,859,995
2014 2,984,734 9,895,846 12,880,580
2013 3,022,155 9,859,980 12,882,135
2012 3,063,051 9,812,204 12,875,255
2011 3,096,540 9,772,719 12,869,259
2010 3,125,930 9,717,236 12,843,166
2009 3,174,067 9,736,342 12,910,409
2008 3,180,764 9,720,800 12,901,564

more history ...

1. The Census defines a vacant unit as belonging to the following set: For rent, Rented not occupied, For sale only, Sold not occupied, For seasonal or recreational or other occasional use, For migrant workers, Other vacant. ↩

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