McHenry County, Illinois
county in Illinois, United States
McHenry County is a county in the U.S. state of Illinois. In the 2010 census, 308,760 people lived there. The county seat is Woodstock. It is the sixth-most populous county in Illinois.
McHenry County was founded in 1836 and named for William McHenry.
This short article about a place or feature in the United States can be made longer. You can help Wikipedia by adding to it.