DuPage County , Illinois

DuPage County: County in Illinois, United States

DuPage County locator map
Location of DuPage County on Illinois map.


DuPage County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 916,924 and a population density of 1,052 people per km². After 9 years in 2019 county had an estimated population of 922,921 inhabitants. Its county seat is Wheaton. The county was created 182 years ago in 1839.


DuPage County is located at 41°51'7"N 88°5'8"W (41.8519500, -88.0856700). It has 2 neighbors: Cook County and Will County.

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The largest city of DuPage County is Naperville with a population of 101,947. Other cities include, Wheaton population 52,745, Elmhurst population 46,746, Woodridge population 33,432 and West Chicago population 26,816. See all DuPage County cities & populated places.


DuPage County forecast: Mostly sunny, with a high near 83. more

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DuPage County map

DuPage County Quick Facts

Population : 922,921 (2019)
Country : United States of America
State : Illinois (United States)
Area : 872 km2
Water as percent of area : 2.6%
Land as percent of area : 97.4%
Named for : DuPage River
Altitude : 751 feet / 229 meters
Capital : Wheaton
Establishment : February 02, 1839
Time Zone : America/Chicago
Local time : 19:32:10 (4th August 2021)
Density : 1,058 Pop. per km² as of 2019
Population growth : 0.65% (2010-2019)
Weather : 83℉ Mostly Sunny 7-days weather

DuPage County has 2 neighbours.

  • Wheaton


The population of DuPage County increased by 0.65% in 9 years.

Year Population % Change Method
2010 916,924 - census
2011 924,831 0.85% estimation process
2012 928,666 0.41% estimation process
2013 932,231 0.38% estimation process
2014 933,425 0.13% estimation process
2015 933,609 0.02% estimation process
2016 931,256 -0.25% estimation process
2017 930,265 -0.11% estimation process
2018 927,247 -0.33% estimation process
2019 922,921 -0.47% estimation process

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People born in DuPage County (5)

People born in DuPage County, including basketball player Lenae Williams, rower Peter Nordell, author Henry Augustine Smith, you can see a list of people who born in DuPage County.

  • Kenneth A. Johnson (American sport shooter)
  • Emma Graham Clock (American author and botanical artist)

DuPage County Populated Places (more)

Cities, Towns, Neighborhoods & Other Populated Places in DuPage County.

City Name Population Title
Naperville 101,947 City in DuPage and Will counties in Illinois, United States
Wheaton 52,745 City in DuPage County, Illinois, United States
Downers Grove 49,057 Village in Downers Grove, Lisle, and York Townships, DuPage County, Illinois, US
Elmhurst 46,746 City in Illinois
Lombard 44,303 Village in Illinois
Carol Stream 39,203 Town
Addison 36,482 Village in DuPage County, Illinois, United States
Glendale Heights 33,617 Town
Woodridge 33,432 Suburb of Chicago in Illinois, USA
Glen Ellyn 27,714 Town in DuPage County, Illinois, USA
West Chicago 26,816 City in DuPage County, Illinois, United States
Westmont 24,443 City in DuPage County, Illinois, United States of America
Lisle 23,270 Town in Illinois
Roselle 22,463 Village in Ilinois, United States of America
Bloomingdale 21,779 Township in DuPage County, Illinois
Darien 21,628 Town in Connecticut

Illinois Other Counties (more counties)

County Name Population Title
Illinois 12,671,821 State of the United States of America
Cook County 5,150,233 County in Illinois, United States
Chicago 2,693,976 City and county seat of Cook County, Illinois, United States
Lake County 696,535 County in Oregon, United States
Will County 690,743 County in Illinois, United States
Kane County 532,403 County in southern Utah, United States
Markham 328,966 City in Cook County, Illinois, United States
McHenry County 307,774 County in Illinois, United States
Winnebago County 282,572 County in Illinois, United States
Madison County 262,966 County in Montana, United States
Saint Clair County 259,686 The County of St.
Champaign County 209,689 County in Illinois, United States
Sangamon County 194,672 County in Illinois, United States
Peoria County 179,179 County in Illinois, United States of America
McLean County 171,517 County in North Dakota, United States
Rockford 169,980 County seat of Winnebago County, Illinois, United States

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