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 collar counties of 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 more recently experienced rapid rates of suburbanization, exurbanization and urbanization, but the western portions of the county remain 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 2020 census it had a population of 27,740. It is a part of the Chicago metropolitan area.
Bull Valley is a village in McHenry County, Illinois, United States. The population was 1,077 at the 2010 census. Surrounded by the suburban sprawl of Crystal Lake, Woodstock, and McHenry, the village prides itself in its rural, low-density character.
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.
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 2010 census, its population was 15,636. 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.
Hanover Township is one of 29 townships in Cook County, Illinois, USA and is located at the end of the county's panhandle. As of the 2010 census, its population was 99,538. Hanover Township was established on April 2, 1850. The first reported population of the Township was 672. The Township gets its name from the "Kingdom of Hanover in Western Germany," which is where a majority of the Township's first residents originated from.
Palatine Township is one of 29 townships in Cook County, Illinois, United States. As of the 2010 census, its population was 112,994. It is the north central township of the six northwest townships that form the Cook County panhandle. Palatine Township was organized in 1850.
Schaumburg Township is one of 29 townships in Cook County, Illinois, USA. As of the 2010 census, its population was 131,288. It is in the north west corner of Cook County.
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.
Fremont Township is a township in Lake County, Illinois, USA. As of the 2010 census, its population was 32,337.
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 8th, 1867.
Wauconda Township is a township in Lake County, Illinois, USA. As of the 2010 census, its population was 21,730.
Dorr Township is located in McHenry County, Illinois. As of the 2010 census, its population was 20,911 and it contained 8,520 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.
Seneca Township is located in McHenry County, Illinois. As of the 2010 census, its population was 2,944 and it contained 1,106 housing units.
United States 
Illinois 
