In conjunction with the grand opening of the Historical Museum Annex, Edgar County Genealogy Library held its opening ceremony on Sunday, November 20, 1988. For months prior to the opening, a founding committee worked to establish the library as a resource for researchers. ECGS members serving on the committee were Virginia Zimmerly, John Gibson, and A. Joyce Brown.
The new genealogy library was open 15 hours per week. Barbara Hammond was its executive director until 2000. The first library board was made up of four members from each society. ECGS members of the new board were Edythe Stephens, John Gibson, Phyllis Sutton, and Lloyd Lindsey.
Today, Edgar County Genealogy Library continues to be a valuable resource to genealogy and local history researchers. Thanks to executive director Linda Cary and the staff of volunteer librarians, the library is open 21 hours per week.