The following list includes historic landmarks of McHenry County that have been landmarked/plaqued by one of the following organizations:

~ The National Register of Historic Places
~ McHenry County Historic Preservation Commission
~ McHenry County Historical Society
~ Crystal Lake Historic Preservation Commission
~ The Greater Harvard Historical Society
~ Crystal Lake Polly Crandall Questers
~ City of Woodstock

McHenry County
ComprehensiveLandmark
List