McHenry County is a county located in the U.S. state of Illinois. According to the 2020 Census, it had a population of 310,229, making it the sixth-most populous county in Illinois. Its county seat is Woodstock. McHenry County is one of the five Illinois collar counties in the Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area. Long known as a center of recreation along with agriculture in the western portion, it has recently experienced rapid rates of suburbanization, exurbanization and urbanization, but the western segment of the county remains primarily agricultural and rural.
Barrington Hills is a village located about 40 miles (64 km) northwest of Chicago in the U.S. state of Illinois. Per the 2020 census, the population was 4,114. It straddles approximately 29 square miles (75 km2) over four counties, Cook, Kane, Lake, and McHenry. The Village of Barrington Hills was incorporated in 1957.
Algonquin is a village in McHenry and Kane counties, Illinois, in the United States. It is a suburb of Chicago, located approximately 40 miles (64 km) northwest of the Loop. As of the 2020 census, the village's population was 29,700.
Huntley is a village in McHenry and Kane counties, Illinois, United States. As of the 2021 census it had a population of 28,008. It is a part of the Chicago metropolitan area.
Lakemoor is a village in Lake and McHenry counties in the U.S. state of Illinois. Per the 2020 census, the population was 6,182.
Bull Valley is a village in McHenry County, Illinois, United States. The population was 1,128 at the 2020 census. Surrounded by larger, exurb towns of Crystal Lake, Woodstock, and McHenry, the village prides itself in its rural, low-density character. The village is in the outer most ring of the Chicago suburbs.
Cary is a village located in Algonquin Township, McHenry County, Illinois, and Cuba Township, Lake County, Illinois, United States. Per the 2020 census, the population was 17,826.
The Village of Lakewood is a village in McHenry County, Illinois, United States. It was incorporated as a village on July 10, 1933. Per the 2020 census, the population was 4,283. Although commonly referred to as Lakewood, the town's proper name is preceded by 'The Village of'.
Dundee Township occupies the 6-mile (9.7 km) square in the Northeast corner of Kane County, Illinois. It includes West and East Dundee, Carpentersville, Sleepy Hollow, Gilberts and portions of Elgin, Barrington Hills, Hoffman Estates, and Algonquin. It is divided by the Fox River.
Rutland Township is one of sixteen townships in Kane County, Illinois. As of the 2010 census, its population was 18,806 and it contained 8,004 housing units. It was originally called Jackson Township; the name was changed to Rutland on July 2, 1850.
Barrington Township is one of 29 townships in Cook County, Illinois, USA. As of the 2020 census, its population was 16,514 and it contained 6,172 housing units. The northwestern corner of the Cook County panhandle, it is the county's northwesternmost township. It is also by far the least densely populated township in the county, with less than half the population density of the next least Lemont Township.
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.
Cuba Township is a township in Lake County, Illinois, USA. As of the 2010 census, its population was 16,826. Cuba Township was originally named Troy Township, but was renamed to Cuba in support of the López Expedition of 1851, when it was discovered the township name of Troy was already taken.
Ela Township is a township in Lake County, Illinois, USA. As of the 2010 census, its population was 42,654.
Grant Township is a township in Lake County, Illinois, USA. As of the 2010 census, its population was 26,523. Grant Township changed its name from Goodale Township on March 8, 1867.
Wauconda Township is a township in Lake County, Illinois, USA. As of the 2020 census, its population was 23,628.
Dorr Township is located in McHenry County, Illinois. As of the 2020 census, its population was 21,752 and it contained 8,929 housing units. Dorr Township changed its name from Centre Township on December 28, 1850.
Grafton Township is located in McHenry County, Illinois. As of the 2010 census, its population was 53,137 and it contained 17,922 housing units. Grafton Township includes portions of Huntley, Lake in the Hills, Algonquin, Crystal Lake, and Lakewood.
McHenry Township is located in McHenry County, Illinois. As of the 2010 census, its population was 47,653 and it contained 19,120 housing units. McHenry Township shares the distinction with Nunda Township as being the two largest townships by land area in McHenry County, at 48.3 square miles (125 km2) each.
Seneca Township is located in McHenry County, Illinois. As of the 2020 census, its population was 2,893 and it contained 1,102 housing units.
United States 
Illinois 
