McHenry County Map
The County of McHenry is located in the State of Illinois. Find directions to McHenry County, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. According to the 2020 US Census the McHenry County population is estimated at 305,888 people. The McHenry County time zone is Central Daylight Time which is 6 hours behind Coordinated Universal Time (UTC).
Nearby counties include Boone County, Cook County, DeKalb County, Kane County, Lake County, Kenosha County, Walworth County.
Top cities include Crystal Lake, Algonquin, Lake in the Hills, McHenry, Woodstock