McHenry

Also known as McHenry, Illinois, McHenry, IL, City of McHenry

city in Illinois, United States

Key facts

Country: United States
State: Illinois
County: McHenry
Townships: McHenry Township , Nunda Township , Grant Township , Wauconda Township .
Founded: May 10, 1836
Named after: William McHenry
Type: Mayor–council government
Total: 14.96 sq mi (38.74 km )
Land: 14.54 sq mi (37.65 km )
Water: 0.42 sq mi (1.09 km )
Elevation: 810 ft (250 m)
Density: 1,866.7/sq mi (720.74/km )
Time zone

Article

McHenry is a city in McHenry County, Illinois, United States. It is located about 46 miles northwest of Chicago. Per the 2020 census, the population was 27,135. McHenry was at one time the county seat of McHenry County, which once included adjoining Lake County to the east. McHenry took its name from the county, which was named for Major William McHenry, a prominent US Army officer in the Black Hawk War.

It rests at an elevation of 797 feet and the Fox River flows through the eastern portion of the city. It is surrounded by natural lakes and streams, grassy moraine hills, gravel banks and shallow nutrient-rich peat bogs, remnants of receding glaciers from the last ice age. Moraine Hills State Park, Glacial Park Conservation Area, and Volo Bog State Natural Area preserve some of these natural features.