What is the population of Will County?

The population of Will County, IL is 688,726.

Where is Will County located?

Will County, IL is located at latitude 41.4450300 and longitude -87.9786600. It is in United States.

What is the area of Will County?

The area of Will County, IL is 849 km².

What is the elevation of Will County?

Will County, IL has an elevation of 213 meters (699 feet) above sea level.

What time zone is Will County in?

Will County, IL is in the America/Chicago time zone.

How has the population of Will County changed?

The population of Will County, IL has increased from 677,560 (2010) to 688,726 (2020), a change of 1.6%.

Will County, Illinois

Will County: county in Illinois, United States

About

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 10 years in 2020 county had an estimated population of 688,726 inhabitants. Its county seat is Joliet. The county was created 190 years ago in 1836.

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

County Snapshot

Will County at a glance

Will County currently has 30 quality-checked populated place pages linked on MapSof, making it easier to jump from the county overview into local city pages.

Browse county places

Mapped populated places

These counts use a stricter populated-place filter so the main lists stay focused on real city and town pages.

Illinois counties

102

Open related pages

Largest city

Joliet

Population 85,583

Quick Facts about Will County

Population	688,726 (2020)
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%
Latitude & Longitude	41.4450,-87.9787
Named for	Conrad Will
Altitude	699 feet / 213 meters
Capital	Joliet
Establishment	January 12, 1836
Time Zone	America/Chicago
Local time	22:06:50 (15th April 2026)
Density	811 Pop. per km² as of 2020
Population growth	1.62% (2010-2020)
Weather	67℉ Showers And Thunderstorms Likely 7-days weather

Joliet State Prison '10045283735' image

Geography

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.

Will County map

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The largest city of Will County is Joliet with a population of 85,583. Other cities include, Bolingbrook population 74,025, Lockport population 59,877, Romeoville population 39,770 and New Lenox population 27,088. See all Will County cities & populated places.

Will County Populated Places (more)

Cities, towns, neighborhoods & other populated places in Will County.

City Name	Population	Title
Joliet	85,583	The second most populous city in Will County, Illinois.
Bolingbrook	74,025	Town in Illinois
Lockport	59,877	The most populous city in Will County, Illinois.
Romeoville	39,770	Town
New Lenox	27,088	Village in Illinois
Homer Glen	24,281	Village in Illinois, United States
Crest Hill	21,153	City in Will County, Illinois, United States
Mokena	20,050	City in Illinois, United States of America
Goodings Grove	18,569	City in Illinois, United States of America
Shorewood	17,495	Village in Illinois
Channahon	13,409	City in Illinois, United States of America
Frankfort Square	9,276	Census-designated place in Will County, Illinois, United States
Manhattan	8,798	Village in Illinois
Crete	8,493	Town in the U.
Braidwood	6,148	City in Will County, Illinois, United States
Wilmington	5,597	Town in Will County, Illinois, United States

Weather

67°F

Showers And Thunderstorms Likely

15 to 20 mph S Wednesday

Showers and thunderstorms likely. Mostly cloudy, with a high near 67.

7-Day Forecast

Official website of Will County

Official Website

Will County has 5 neighbours.

Cook County county in Illinois, United States
DuPage County county in Illinois, United States
Grundy County county in Illinois, United States
Kankakee County county in Illinois, United States
Lake County County in Indiana, United States

Demographics

The population of Will County increased by 1.62% in 10 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
2020	688,726	-0.29%	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

Illinois Other Counties (more counties)

County Name	Population	Title
Cook County	5,108,284	County in Illinois, United States
Chicago	2,677,643	The third most populous city in the United States and the center of the Chicago metropolitan area.
DuPage County	917,481	County in Illinois, United States
Lake County	693,593	County in Oregon, United States
Kane County	531,010	County in southern Utah, United States
McHenry County	305,888	County in Illinois, United States
Winnebago County	281,295	County in Illinois, United States
Madison County	262,635	County in Montana, United States
Saint Clair County	258,046	The County of St.
Champaign County	209,192	County in Illinois, United States
Aurora	196,383	The second most populous city in Illinois.
Sangamon County	193,882	County in Illinois, United States
Peoria County	177,652	County in Illinois, United States of America
McLean County	171,256	County in North Dakota, United States
Naperville	147,986	The second most populous city in Illinois.
Rockford	144,835	The second most populous city in Illinois.