The McHenry County Historical Society & Museum Library welcomes questions about the history of McHenry County, its communities, people, homes, businesses, organizations, and historic photographs.

Please fill out the form below and provide as much detail as possible so we can assist you efficiently. Simple questions are often answered quickly at no charge, while more in-depth research requests may require additional time (6-8 weeks). We charge a research fee of $30.00 per hour. See our Research Fees for more information.

Current members receive complimentary research benefits. If you are interested in becoming a member, see our Membership page.