Computer-Assisted Genealogy Group of Northern Illinois
- CAGG-NI is a software group for amateur genealogists seeking to leverage computer tools and technologies in support of their research activities.
- http://www.rootsweb.com/~ilcaggni

Morgan Area Genealogical Association
- Site contains a variety of free genealogical information for the west central counties of Cass, Greene, Macoupin, Morgan, Menard, Sangamon, and Scott.
- http://www.rootsweb.com/~ilmaga/

Czech & Slovak American Genealogy Society of Illinois
- Genealogy group for those interested in Central/Eastern European and Chicago area genealogy.
- http://www.csagsi.org/

Illinois State Genealogical Society
- Individuals with home page that has an Illinois connection and has genealogical content. Listed by surname and county.
- http://www.rootsweb.com/~ilsgs/

Revolutionary War Soldiers Buried in Illinois
- Part of the Illinois Trails History and Genealogy Project. Revolutionary War Soldiers buried in Illinois, by County.
- http://www.iltrails.org/rwdx.htm