Algonquin Township, Illinois

Algonquin Township is located in McHenry County, Illinois, with the township office in the city of Crystal Lake.^[2] As of the 2020 census, its population was 87,633 and it contained 33,960 housing units. It is the largest township by population in McHenry County.

Algonquin Township
Township
Location in McHenry County
Coordinates: 42°11′48″N 88°16′41″W[1]
Country	United States
State	Illinois
County	McHenry
Township	Algonquin
Established	November 6, 1849
Government
• Supervisor	Randy Funk
Area
• 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  (2020)
• Total	87,633
• Density	1,904.2/sq mi (735.2/km2)
Time zone	UTC-6 (CST)
• Summer (DST)	UTC-5 (CDT)
Area codes	815, 779, 847, 224
FIPS code	17-111-00698
Website	www.algonquintownship.com
[2]

Geography

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.^[3]

Cities, towns, villages

• Algonquin (mostly)
• Barrington Hills (small portion)
• Cary
• Crystal Lake (mostly)
• Fox River Grove (mostly)
• Lake in the Hills (half)
• Lakewood (small portion)
• Oakwood Hills (small portion)
• Port Barrington (western third)
• Trout Valley

Demographics

Historical population

Census	Pop.	Note	%±
2010	88,389		—
2020	87,633		−0.9%
U.S. Decennial Census[4]