McHenry, Illinois
McHenry is a city in McHenry County, Illinois, United States. It is an outer suburb, part of the Chicago metropolitan area and is located about 56 miles northwest of Chicago and 64 miles southwest of Milwaukee. The population was 26,992 at the 2010 census. 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,... Show more 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 and Volo Bog State Natural Area preserve some of these natural features.