DuPage County IL Information


DuPage County Subdivisions

DuPage County IL Data & Demographics (As of July 1, 2021)


Total Population 915,042 (100%)
Population in Households 902,214 (98.6%)
Population in Families 759,805 (83.0%)
Population in Group Quarters1 12,828 ( 1.4%)
Population Density 2,794
Diversity Index2 59


Median Household Income $97,377
Average Household Income $126,758
% of Income for Mortgage4 14%
Per Capita Income $47,104
Wealth Index5 162


Total HU (Housing Units) 361,544 (100%)
Owner Occupied HU 250,234 (69.2%)
Renter Occupied HU 89,366 (24.7%)
Vacant Housing Units 21,944 ( 6.1%)
Median Home Value $321,202
Average Home Value $387,635
Housing Affordability Index3 133


Total Households 339,600
Average Household Size 2.66
Family Households 234,924
Average Family Size 3
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.


2010-2021 2021-2026
Population -0.02% -0.03%
Households 0.06% 0.03%
Families -0.12% -0.06%
Median Household Income   1.63%
Per Capita Income   2.08%
Owner Occupied HU   0.15%


DuPage County IL - Peer Comparisons by Rank and Percentile

The table below compares DuPage County to the other 102 counties and county equivalents in Illinois by rank and percentile using July 1, 2021 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 2 99th
Population Density # 2 99th
Median Household Income # 2 99th
Housing Affordability Index # 7 7th
Per Capita Income # 1 100th
Diversity Index # 6 95th

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