Welcome to the Cook County ILGenWeb home page. 

This county is up for adoption and needs a new county coordinator! Are you interested in Cook County Genealogy and helping other researchers? Then you may be the perfect fit to be the new county coordinator! See the ILGenWeb adoption page for more information!

The resources on this website are provided to as aids for your genealogy and family history research.  The information has all been donated and we always welcome contributions!

Cook County was created January 15, 1831 from Putnam County. Named after Daniel Cook, the county was the 54th county of the state.

Some tips to get you started: