Will County , Illinois

Will County: County in Illinois, United States

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


Will County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 677,560 and a population density of 798 people per km². After 9 years in 2019 county had an estimated population of 690,743 inhabitants. Its county seat is Joliet. The county was created 185 years ago in 1836.


Will County is located at 41°26'42"N 87°58'43"W (41.4450300, -87.9786600). It has 5 neighbors: Cook County, DuPage County, Grundy County, Kankakee County and Lake County.

Joliet State Prison '10045283735' image
Joliet State Prison '10045283735'

The largest city of Will County is Joliet with a population of 86,178. Other cities include, Lockport population 59,979, Plainfield population 42,527, Crest Hill population 21,153 and Mokena population 20,159. See all Will County cities & populated places.


Will County forecast: Sunny, with a high near 90. more

Joliet State Prison '10045283735' image

Will County map

Will County Quick Facts

Population : 690,743 (2019)
Country : United States of America
State : Illinois (United States)
Area : 849 km2
Official name : Will County
Water as percent of area : 1.5%
Land as percent of area : 98.5%
Named for : Conrad Will
Altitude : 699 feet / 213 meters
Capital : Joliet
Establishment : January 01, 1836
Time Zone : America/Chicago
Local time : 16:03:17 (27th July 2021)
Density : 814 Pop. per km² as of 2019
Population growth : 1.91% (2010-2019)
Weather : 90℉ Sunny 7-days weather

Will County has 5 neighbours.


The population of Will County increased by 1.91% in 9 years.

Year Population % Change Method
2010 677,560 - census
2011 680,827 0.48% estimation process
2012 682,477 0.24% estimation process
2013 683,734 0.18% estimation process
2014 685,158 0.21% estimation process
2015 685,877 0.1% estimation process
2016 688,328 0.36% estimation process
2017 690,479 0.31% estimation process
2018 691,149 0.1% estimation process
2019 690,743 -0.06% estimation process

Comitatul Will, Comte de Will, Comté de Will, Condado de Will, Condado han Will, Contea di Will, Hrabstwo Will, Okrug Vil, Owil srjan, Quan Will, Quận Will, Uil, Uill, Vill, Will, Will Comitatus, Will Kun, Will Kūn, Will konderria, Will megye, mqatʿt wyl, shhrstan wyl aylynwy, u'ila ka'unti, u~iru jun, wei er xian, Вілл, Округ Вил, Уил, Уилл, Ուիլ շրջան, شهرستان ویل، ایلینوی, مقاطعة ويل, ول کاؤنٹی, ول کاؤنٹی، الینوائے, উইল কাউন্টি, ウィル郡, 威爾縣

Will County Populated Places (more)

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

City Name Population Title
Joliet 86,178 City in Illinois, United States
Bolingbrook 74,545 Town in Illinois
Lockport 59,979 City in Niagara County, New York, United States
Plainfield 42,527
Romeoville 39,746 Town
New Lenox 26,926 Village in Illinois
Homer Glen 24,472 Village in Illinois, United States
Crest Hill 21,153 City in Will County, Illinois, United States
Mokena 20,159 City in Illinois, United States of America
Frankfort 18,653
Goodings Grove 18,569 City in Illinois, United States of America
Shorewood 17,509 Village in Illinois
Channahon 13,239 City in Illinois, United States of America
Frankfort Square 9,276 Census-designated place in Will County, Illinois, United States
Manhattan 8,240 Village in Illinois
Crete 8,023 Town in the U.

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
DuPage County 922,921 County in Illinois, United States
Lake County 696,535 County in Oregon, 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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