Genealogy and Historical Societies often have a wealth of information. Many provide these services free while others charge a minimal amount. When asking for help, please don’t ask them to search for every Surname you are researching.
- Illinois State Genealogical Society
- BIGWILL Genealogists
- Cary-Grove Historical Society
- Computer Assisted Genealogy Group
- Computer-Assisted Genealogy Group of Northern Illinois
- Crystal Lake Historical Society
- Czech & Slovak American Genealogy Society of Illinois.
- Elgin Genealogical Society
Genealogical & Historical Societies of Illinois
- Genealogy Society of Southern Illinois (GSSI)
- Huguenot Society of Illinois
- Illiana Jewish Genealogical Society
- Illinois Daughters of the American Revolution
- Illinois Heritage Association
- Iroquois County Genealogy Society
- Jewish Genealogical Society of Illinois
- Kane County Genealogical Society
- Northwest Suburban Council of Genealogists
- Polish Genealogical Society of America
- SAGA-OMII Genealogical Association
- South Suburban Genealogical and Historical Society
- The Burlington Route Historical Society
- Tri-State Genealogical Society – Indiana, Illinois and Kentucky
County Specific Societies
Adams County
Bond County
Boone County
Brown County
Bureau County
Calhoun County
- Calhoun County Historical Society
Carroll County
Cass County
Champaign County
Christian County
Clark County
- Clark County Genealogical Society, 309 Maple Street, P.O. Box 153, Marshall, IL 62441
- Clark County Historical Society
Clay County
Clinton County
- Clinton County Historical Society, 1091 Franklin St, Carlyle IL 62231; 618-594-4015
- Clinton County Historical Society Facebook Page
Coles County
Cook County
- Chicago and North Western Historical Society
- Chicago Historical Society, Chicago
- Des Plaines History Center, 789 Pearson Street, Des Plaines, IL 60016
- Evanston History Center, Evanston
- Schaumburg Genealogical Society
- Sons of the American Revolution, Fort Dearborn-Chicago Chapter
- South Suburban Genealogical & Historical Society, South Holland
- Tinley Moraine Genealogists, Tinley Park
- Tinley Park Historical Society
- Wilmette Historical Museum & Wilmette Historical Society, Wilmette
Crawford County
- Crawford County Historical Society, Robinson
Cumberland County
- Cumberland County Historic Society, 216 Cumberland St Box 582, Greenup IL 62428; 217-923-9306
DeKalb County
DeWitt County
Douglas County
- Douglas County Genealogical Society, P.O. Box 113, Tuscola, IL 61953
- Douglas County Museum
DuPage County
- DuPage County Genealogical Society, Lombard
- Fox Valley Genealogical Society, Naperville (Covers portions of DuPage, Kane, Kendall, & Will counties)
- Genealogical Forum of Elmhurst, Elmhurst
- Hinsdale Historical Society, Hinsdale
- Western Springs Historical Society, Western Springs
Edgar County
Edwards County
- Edwards County Historical Society, 212 W. Main St, Albion, IL 62806
- Edwards County Historical Society Museum
Effingham County
- Effingham County Genealogical and Historical Society, PO Box 1166, Effingham, IL 62401
- Effingham County Cultural Center and Museum
Fayette County
Ford County
Franklin County
Fulton County
Greene County
- Greene County Historical & Genealogical Society
Grundy County
- Carbon Hill Museum/Historical Society, 875 Second St, Carbon Hill, (815) 634-4213, Michele Micetich, Curator/Director
- Will/Grundy Genealogical Society, Wilmington
Hamilton County
Hancock County
Hardin County
- Hardin County Historical & Genealogical Society, PO Box 72, Elizabethtown, IL 62931
Henry County
- Galva Historical Society, Galva
- Henry County Genealogical Society, Kewanee
- Henry County Historical Society, Bishop Hill
- Kewanee Historical Society, Kewanee
Iroquois County
- Iroquois County Genealogical Society, Watseka
- Iroquois County Historical Society, Watseka
Jackson County
- Jackson County Historical Society, Murphysboro
Jasper County
- Jasper County Genealogical & Historical Society, 100 S. VanBuren, Newton, IL 62448
Jefferson County
- Jefferson County Historical Society
- Jefferson County Genealogical Society, 101 S. Seventh St, Mt. Vernon, IL 62864-4187
- Mt. Vernon Genealogical Society, 101 S. Seventh, Mt. Vernon, IL 62864
Jersey County
- Jersey County Historical Society, Jerseyville
Jo Daviess County
Johnson County
Kane County
- Elgin Genealogical Society, Elgin
- Fox Valley Genealogical Society, Naperville (Covers portions of DuPage, Kane, Kendall, & Will counties)
- Kane County Genealogical Society, Geneva
Kankakee County
- Kankakee Valley Genealogical Society, Bourbonnais
- Kankakee County Historical Museum, Kankakee
Kendall County
- Fox Valley Genealogical Society, Naperville (Covers portions of DuPage, Kane, Kendall, & Will counties)
- Kendall County Genealogical Society, PO Box 123, Yorkville, IL 60560-0123
- Kendall County Historical Society, Yorkville
Knox County
- Knox County Genealogical Society, Galesburg
Lake County
- Barrington Area Historical Society, Barrington
- Lake County Genealogical Society, Mundelein
- Lakes Region Historical Society and Museum
- Warren Township Historical Society, Gurnee
- Waukegan Historical Society, Waukegan
- Zion Genealogical Society
LaSalle County
- Earlville Community Historical Society, Earlville; Maureen Corrigan, Director Earl Township Public Library for dates and times.
- LaSalle County Genealogy Guild, Ottawa
Lawrence County
- Lawrence County Historical Society, Lawrenceville
Lee County
Livingston County
- Dwight Genealogical Society, PO Box 315, Dwight IL 60420
- Lexington Genealogical & Historical Society, Inc., Lexington (Covers Livingston, McLean & Woodford Counties)
- Odell Prairie Trails Historical & Genealogical Society, PO Box 82, Odell IL 60460
Logan County
- Logan County Genealogical & Historical Society, Lincoln; email
- Mt. Pulaski Township Historical Society, Mt. Pulaski
Macon County
- Decatur Genealogical Society, Decatur; email
- Macon County Historical Society & Museum, Decatur
Macoupin County
Madison County
- Madison County Genealogical Society, Edwardsville
- Troy Historical Society, Troy
Marion County
Marshall County
- City of Henry Historical & Genealogical Society, 610 North St, Henry IL 61537
- Marshall County Historical Society, Lacon
Mason County
- Mason County Genealogical & Historical Society, Havana
- Mason City Area and Family History Society, Mason City
Massac County
- Massac County Genealogical Society, Metropolis
McDonough County
McHenry County
- McHenry County Genealogical Society, Crystal Lake
McLean County
- Lexington Genealogical & Historical Society, Inc., Lexington (Covers Livingston, McLean & Woodford Counties)
- McLean County Genealogical Society, Normal
- McLean County Historical Society, Bloomington
Mercer County
Monroe County
- Monroe County Genealogical Society, Columbia
Montgomery County
Morgan County
- Jacksonville Area Genealogical & Historical Society, Jacksonville
- Meredosia Area Historical & Genealogical Society, PO Box 304, Meredosia IL 62665
- Waverly Genealogical & Historical Society, 157 E. Tremont, Waverly IL 62692
Moultrie County
Ogle County
Peoria County
- Peoria Genealogical Society, Peoria
Perry County
- Perry County Historical Society, 108 W. Jackson St, Pinckneyville IL 62274
Piatt County
- Piatt County Genealogical & Historical Society, Monticello
Pike County
- Griggsville Area Genealogical & Historical Society, PO Box 75, Griggsville IL 62340
- Pike County Historical Society
- Pike/Calhoun Genealogical Society, PO Box 104, Pleasant Hill IL 62366
Putnam County
- Putnam County Historical Society, Hennepin IL 61327
Randolph County
- Randolph County Genealogical Society, Chester
Richland County
- Richland County Genealogical Society, PO Box 202, Olney IL 62450
Rock Island County
- Colonel Davenport Historial Foundation Rock Island, Rock Island
- Hampton Historical Society, 601 1st Ave, Hampton IL 61256; (309) 755-0362
- Rock Island Arsenal Historical Society, Rock Island IL 61299
- Rock Island County Historical Society
- Rock Island County IL Genealogical Society, Rock Island
Saline County
- Saline County Genealogical Society, PO Box 4, Harrisburg IL 62946
Sangamon County
- Sangamon County Genealogical Society, Springfield
Schuyler County
Shelby County
St. Clair County
- Freeburg Genealogical & Historical Society
- Marissa Genealogical & Historical Society, Marissa
- O’Fallon Historical Society, O’Fallon
- St Clair County Genealogical Society, Belleville
- St Clair County Genealogical Society, Belleville
- Belleville Historical Society, Belleville
- Millstadt Historical Society, Millstadt – no website yet – for information call 618 476-3696
Stark County
Stephenson County
- Lena Area Historical Society, PO Box 620, Lena IL 61048
- Stephenson County Genealogical Society, PO Box 514, Freeport IL 61032
- Stephenson County Historical Society, Freeport
Tazewell County
Union County
Vermilion County
Warren County
Washington County
- Washington County Historical Society, 326 S. Kaskaskia St, Nashville IL 62263
Wayne County
- Wayne County Historical Society Fairfield
White County
Whiteside County
- Morrison Historical Society, 229 E. Main St, PO Box 1, Morrison IL 61270
- Prophetstown Area Historical Society, 320 Washington St, Prophetstown IL 61277
- Sterling-Rock Falls Historical Society, Sterling
- Tampico Area Historical Society, Tampico
- Tri-Township Heritage House, 306 Lime St, Albany IL 61230 (covers Albany, Garden Plain, Newton Twps.)
- Whiteside County Genealogists, PO Box 145, Sterling IL 61081
Will County
- Fox Valley Genealogical Society, Naperville (Covers portions of DuPage, Kane, Kendall, & Will counties)
- Lockport Area Genealogical & Historical Society, Lockport
- Northern Will County Genealogical Society, Bolingbrook
- South Suburban Genealogical & Historical Society
- Will/Grundy Genealogical Society, Wilmington
- Will County Historical Society
Williamson County
Winnebago County
- Kishwaukee Genealogists, Rockford
- Winnebago & Boone Counties Genealogical Society, Rockford
Woodford County
- Lexington Genealogical & Historical Society, Inc. (Covers Livingston, McLean & Woodford Counties)
On this page of your site:
https://illinoisgenealogy.org/illinois-genealogy-societies
you have this listing for Randolph County Genealogical Society:
Randolph County Genealogical Society, Chester
We’ve moved our office/library from Chester, IL to Steeleville, IL and we no longer update the Rootsweb site (although it’s still live) and instead have a .org website . If we could get the city changed to Steeleville, and the url changed to this website:
https://RCGSIL.org
we’d appreciate having the information updated.
Done! Thanks for letting us know.
Please see posted links under CLAY COUNTY as they are NOT for Illinois counties. One links to Clay County, MN history society. The other links to Clay County, IN genealogy society.
There is a Clay County (IL) Facebook group page here: https://www.facebook.com/Clay-County-Illinois-Genealogical-Society-Library-313477832450885/?ref=page_internal but I am not sure how active it is.