Illinois Digital Archives (IDA) - Includes digitized collections of historical documents from all over Illinois, including images from the web site formerly known as Digital Past. Illinois Digital Archives is an on-going project of the Illinois State Library and participating libraries and institutions.
Illinois State Archives
Look at Illinois - Digitized archive of materials from libraries around Illinois including Woodstock Public Library.
McHenry County Government Center - For more information on the county and state
McHenry County Clerk's Office - To request vital records.
McHenry County Recorder's Office - Searchable land records
City of Harvard
Harvard Diggins Library - Harvard Newspapers
Online Cemetery Records
Lake Avenue Cemetery, Crystal Lake
Nunda Township - Online card files relating to Ridgefield, Prairie Grove, McMillan and Holcombville Cemeteries.
Local Libraries
Algonquin Area Public Library
Cary Area Public Library
Crystal Lake Public Library
Fox Lake Public Library
Johnsburg Public Library
Harvard Diggins Library
Marengo-Union Public Library
Mchenry Public Library
Woodstock Public Library
Historical & Genealogical Societies
BIGWILL - British Isles Interest Group of Wisconsin and Illinois
Winnebago and Boone Counties Genealogical Society
Chicago Genealogical Society
Crystal Lake Historical Society
Computer Assisted Genealogy Group of Northern Illinois
DuPage County Genealogical Society
Elgin Genealogical Society
Illinois State Genealogical Society
Kane County Genealogical Society
Lake County Genealogical Society
McHenry County Historical Society
North Suburban Genealogical Society
Walworth Wisconsin Genealogical Society
McHenry County Towns
Algonquin | Cary | Crystal Lake | Fox River Grove | Huntley | Johnsburg | McHenry | Richmond | Spring Grove | Woodstock
If you know of sites of interest to McHenry County researchers, please submit the URL to the webmaster so that it may be considered for inclusion on this page.