Algonquin Township, McHenry County, Illinois

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Algonquin Township
Location in McHenry County
Location in McHenry County
Coordinates: 42°11′48″N 88°16′41″W / 42.19667°N 88.27806°W / 42.19667; -88.27806Coordinates: 42°11′48″N 88°16′41″W / 42.19667°N 88.27806°W / 42.19667; -88.27806[1]
Country United States
State Illinois
County McHenry
Township Algonquin
Established November 6, 1849
 • Supervisor Dianne Klemm
 • Total 48.03 sq mi (124.4 km2)
 • Land 46.42 sq mi (120.2 km2)
 • Water 1.61 sq mi (4.2 km2)  3.35%
Elevation 902 ft (275 m)
Population (2010)
 • Estimate (2016)[2] 87,411
 • Density 1,904.2/sq mi (735.2/km2)
Time zone CST (UTC-6)
 • Summer (DST) CDT (UTC-5)
Area codes 815, 779, 847, 224
FIPS code 17-111-00698

Algonquin Township is located in McHenry County, Illinois, with the township office in the city of Crystal Lake.[3] As of the 2010 census, its population was 88,389 and it contained 33,212 housing units.[4] It is the largest township by population in McHenry County. Communities located within the township include Algonquin, Barrington Hills, Cary, Crystal Lake, Fox River Grove, Lake in the Hills, Port Barrington, Lakewood, Oakwood Hills, and Trout Valley.


According to the 2010 census, the township has a total area of 48.03 square miles (124.4 km2), of which 46.42 square miles (120.2 km2) (or 96.65%) is land and 1.61 square miles (4.2 km2) (or 3.35%) is water.[4]


Historical population
Census Pop.
Est. 201687,411[2]
U.S. Decennial Census[5]


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