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McHenry County, Illinois

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McHenry County, Illinois Map

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An detailed map of McHenry County. Click on a nearby County to view more information about that County.

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Map of Townships in McHenry County, Illinois

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An interactive map of county subdivisions in McHenry County. In Illinois, that can include Townships, Precincts, and Villages. Find what township you are in now.

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Map of Counties in Illinois

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An interactive map of Counties in Illinois. Click on a County to view more information about that County.

About McHenry County, Illinois

McHenry County is a county located in the U.S. state of Illinois. According to the 2020 Census, it had a population of 310,229, making it the sixth-most populous county in Illinois. Its county seat is Woodstock. McHenry County is one of the five collar counties of the Chicago-Naperville-Elgin, IL-IN-WI Metropolitan Statistical Area. Long known as a center of recreation along with agriculture in the western portion, it has more recently experienced rapid rates of suburbanization, exurbanization and urbanization, but the western portions of the county remain primarily agricultural and rural.

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This site has an interactive map of Illinois Counties. Click on the map to find your Illinois county, and view more details. You can also search for your address and use your GPS to find your Illinois County.

Find what County you are in, and see official Illinois County resources and information. Find any county in the United Stated, along with resources and links to official County websites. See a County map and local details. Looking for what county you are currently in? Find out on this map or use your device GPS to see what county you are in.