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McHenry County Historical Society and Museum

Who We Are

The mission of the McHenry County Historical Society and Museum is, "Providing the methods and means of presenting McHenry County History to enrich life."That includes preserving endangered structures, educating the public and helping people explore their roots and serving as visible advocate for our county's heritage.

The organization celebrated 50 years in 2013 - each filled with educational, entertainment, resource and preservation contributions. Each year schools send about 3,500 students to the Society's museum in Union. The award-winning (formerly voted best small Institution in Illinois by the Illinois Association of Museums) McHenry County Historical Society fields an average of 10 to 15 requests or inquiries each day on property, building and site preservation, family history, business history and object conservation.

The Society's local history research library contains photographs; picture post cards; maps; journals; business, club, school and governmental records; standard local history books; biographical files; scrapbooks; newspapers and other documentary materials such as old phone directories and high school yearbooks which provide the answers to a variety of questions.

What We Do

Besides operating the Museum, the Society plaques historic sites and structures, holds adult workshops and classes, makes available traveling exhibits, and arranges a wide variety of school and other group programs.


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