Will County is a county in the northeastern part of the state of Illinois. According to the 2020 census, it had a population of 696,355, an increase of 2.8% from 677,560 in 2010, making it Illinois's fourth-most populous county. The county seat is Joliet. Will County is one of the five collar counties of the Chicago–Naperville–Elgin, IL–IN–WI Metropolitan Statistical Area. The portion of Will County around Joliet uses area codes 815 and 779, while 630 and 331 are for far northern Will County and 708 is for central and eastern Will County.
Crest Hill is a city in Lockport Township, Will County, Illinois, United States. The 2020 census put Crest Hill's population at 20,459.
Plainfield is a village in Will and Kendall counties, Illinois, United States. The population was 44,762 at the 2020 census.
Romeoville is a village in Will County, Illinois, United States. The village is located 26 mi (42 km) southwest of Chicago on the Gateway Wetlands, directly west of the Des Plaines River. Per the 2020 census, the population was 39,863. It is located in the southwest suburban area of Chicago near Interstate 55 and Interstate 355.
Bremen Township is one of 29 townships in Cook County, Illinois, USA. As of the 2020 census, its population was 107,149 and it contained 42,611 housing units. It was organized in 1850 and is located southwest of Chicago in southern Cook County. An administrative office for Bremen Township is located at 16361 South Kedzie Parkway, Markham, Illinois. It is named after the State of the same name in Germany as this area was settled by primarily German settlers.
Batavia Township is in Kane County, Illinois. It is divided by the Fox River. As of the 2010 census, its population was 35,221 and it contained 12,892 housing units. The western part of the United States Department of Energy's Fermilab is at the township's eastern edge, although most of the facility is in neighboring Winfield Township in DuPage County.
Campton Township is located in Kane County, Illinois. As of the 2010 census, its population was 17,174 and it contained 5,662 housing units.
St. Charles Township is one of sixteen townships in Kane County, Illinois, USA. As of the 2010 census, its population was 50,854 and it contained 19,043 housing units.
Na-Au-Say Township occupies the 6 mile square on the eastern edge of Kendall County, Illinois. As of the 2010 census, its population was 8,145 and it contained 2,534 housing units.
Oswego Township occupies the 6-mile-square-plus additional land to the south of the Fox River in northeast corner of Kendall County, Illinois. As of the 2010 census, its population was 50,870 and it contained 17,914 housing units.
Rich Township is one of 29 townships in Cook County, Illinois, United States located south of Chicago. As of the 2020 census, its population was 76,138. Richton Park serves as the governmental seat for the township.
DuPage Township is located in Will County, Illinois. As of the 2010 census, its population was 87,793 and it contained 28,861 housing units making it the most populous township in the county. Like the county of the same name which it borders on the north, this township is named after the DuPage River.
Frankfort Township is one of 24 townships in Will County, Illinois. As of the 2010 census, its population was 57,055 and it contained 19,720 housing units.
Homer Township is located in Will County, Illinois. As of the 2010 census, its population was 39,059 and it contained 13,418 housing units. In 2001, the village of Homer Glen was incorporated within area that is Homer Township. This region was formerly an unincorporated census-designated place known as Goodings Grove, Illinois.
Joliet Township is located in Will County, Illinois. As of the 2010 census, its population was 87,398 and it contained 32,617 housing units.
Lockport Township is located in Will County, Illinois. As of the 2010 census, its population was 60,010 and it contained 22,016 housing units.
New Lenox Township is located in the heart of Will County, Illinois, on U.S. Route 30 and Interstate 80. As of the 2010 census, its population was 40,270, and it contained 13,721 housing units. New Lenox Township has thirty-six square miles within its jurisdiction. It serves almost all of the Village of New Lenox and parts of the individual municipalities of Mokena, Homer Glen, Joliet and the entire unincorporated areas of the New Lenox community. New Lenox Township changed its name from Vernon Township on June 10, 1850.
Wheatland Township is located in Will County, Illinois. As of the 2010 census, its population was 81,472 and it contained 25,075 housing units.
Otto Township is one of seventeen townships in Kankakee County, Illinois, United States. As of the 2010 census, its population was 2,582 and it contained 937 housing units. It was formed from portions of Aroma and Limestone townships on December 11, 1855 as Carthage Township; its name was changed to Otto Township on March 11, 1857.
Downers Grove Township is one of nine townships in DuPage County, Illinois, US. As of the 2020 census, its population was 149,921 and it contained 61,933 housing units. It is the largest township in the county, both in terms of area and population.
