The Historical Society office is open year round, Monday through Friday from 9:00 a.m. until 4:30 p.m.
We are closed most state and federal holidays.

McHenry County
Historical Society

6422 Main Street, P.O. Box 434
Union, IL 60180

Please contact us by phone
at (815) 923-2267 or
email at info@mchsonline.org