• Friends of Newberry Library
• Genealogy Society of Southern Illinois
• Illinois State Genealogical Society (ISGS)
• Illinois State Historical Society
• Illinois State Historical Library
• Illinois Heritage Association
• Illinois Historic Preservation Agency
• National Genealogical Society
• North Central Illinois Genealogical Society
• Tri-State Genealogical Society

• Abraham Lincoln Presidential Library & Museum, Springfield
• Augustana College Library - Be sure to check out their Special Collections!
• Family History Center Locations
• Illinois State Archives
• IL State Archives - Online Databases
• Illinois State Library
• LibWeb
• Newberry Library, Chicago

• Afro-American Genealogical & Historical Society of Chicago
• African-American Genealogical Research Institute, P.O. Box 637, Matteson, IL 60443
• African-American Cultural & Genealogical Society, 314 North Main St, Decatur, IL 62523
• American Historical Society of Germans from Russia, Northern Illinois Chapter, 208 Cold Spring Court, Palatine, IL 60067-7376
• American Historical Society of Germans from Russia, Oak Park
• British Interest Group of WI & IL
• Center for Belgian Culture, Moline
• Congress of Illinois Historical and Genealogical Societies, Old State Capitol, Springfield, IL 62701
• Council Northeastern Illinois Genealogical Society, 3629 W 14th Place, Midlothian, IL 60445
• Czech & Slovak American Genealogical Society of Illinois (CSAGSI)
• Jewish Genealogical Society of Illinois
• Illiana Jewish Genealogical Society
• Illinois Mennonite Historical & Genealogical Society, Metamora
• Lithuanian American Genealogy Society, Chicago
• Palatines to America, Illinois Chapter, Galesburg
• Polish Genealogical Society of America
• Swedish Genealogy at Bishop Hill, Illinois

• Society of Colonial Wars in the State of Illinois
• The Chicago Chapter, Illinois Society Sons of the American Revolution
• Daughters of the American Revolution, Chicago

Adams County

• Historical Society of Quincy and Adams County, Quincy
• Great River Genealogical Society

• Bond County Genealogical Society, Greenville

• Winnebago & Boone Counties Genealogical Society

• Schuyler-Brown County Genealogical Society, 200 South Congress, Rushville, IL 62681
• Versailles Area Genealogical & Historical Society, Versailles

• Bureau Co. Genealogical Society
• Bureau County Museum, Princeton

• Calhoun County Historical Society, P.O. Box 327, Hardin, IL 62047

• Carroll County Genealogical Society

• Cass County Historical/Genealogical Society

• Champaign County Genealogical Society

• Christian County Genealogical Society

• Clark County Genealogical Society, 309 Maple Street, P.O. Box 153, Marshall, IL 62441

• Clinton County Historical Society, Carlyle

• Coles County Genealogical Society

• Chicago and North Western Historical Society
• Chicago Historical Society, Chicago
• Des Plaines Genealogical Questers, 789 Pearson Street, Des Plaines, IL 60016
• Dunton Genealogical Society, 500 N Dunton, Arlington Heights, IL 60004
• Evanston History Center, Evanston
• North Suburban Genealogical Society, Winnetka
• Northwest Suburban Council of Genealogists, Mount Prospect
• Schaumburg Genealogical Society, 32 W. Library Lane, Schaumburg, IL 60194-3421
• 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 (formerly/a.k.a. Bremen Historical Society of Tinley Park), Mail Address: PO Box 325, Tinley Park, IL 60477, (708) 429-4210; Physical Address: 6727 W. 174th St, Email: lrtphist@lincolnnet.net
• Wilmette Historical Museum & Wilmette Historical Society, Wilmette

• Crawford County Genealogical Society, PO Box 120, Robinson, IL 62454
• Crawford County Historical Society, Robinson

• Cumberland County Historic and Genealogical Society, Greenup

• .

• DeWitt County Genealogical Society, PO Box 632, Clinton, IL 61727; email
• Farmer City Genealogical & Historical Society, P.O. Box 173, Farmer City, IL 61842

• Douglas County Genealogical Society, P.O. Box 113, Tuscola, IL 61953

• 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 Genealogical Society, Paris

• Edwards County Historical Society, 212 W. Main St, Albion, IL 62806

• Effingham County Genealogical Society, PO Box 1166, Effingham, IL 62401

• Fayette County Genealogical & Historical Society, Vandalia

• Ford County Historical Society, Paxton

• Frankfort Area Genealogical Society, PO Box 427, West Frankfort, IL 62896-0427
• Franklin County Genealogical Society, PO Box 524, West Frankfort, IL 62896

• Fulton County Historical & Genealogical Society, P.O. Box 583, Canton, Illinois, 61520

• Greene County Historical & Genealogical Society, Carrollton

• Carbon Hill Museum/Historical Society, 875 Second St, Carbon Hill, (815) 634-4213, Michele Micetich, Curator/Director
• Will/Grundy Genealogical Society, Wilmington

• Hancock County Historical Society, Carthage
• LaHarpe Historical & Genealogical Society, LaHarpe

• Hardin County Historical & Genealogical Society, PO Box 72, Elizabethtown, IL 62931

• Galva Historical Society, Galva
• Henry County Genealogical Society, Kewanee
• Henry County Historical Society, Bishop Hill
• Kewanee Historical Society, Kewanee

• Iroquois County Genealogical Society, Watseka

• Jackson County Historical Society, Murphysboro

• Jasper County Genealogical & Historical Society, 100 S. VanBuren, Newton, IL 62448

• 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 Genealogical Society, Jerseyville

• Johnson County Genealogical and Historical Society, Vienna

• Elgin Genealogical Society, Elgin
• Fox Valley Genealogical Society, Naperville (Covers portions of DuPage, Kane, Kendall, & Will counties)
• Kane County Genealogical Society, Geneva

• Kankakee Valley Genealogical Society, Bourbonnais
• Kankakee County Historical Museum, Kankakee

• 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 Genealogical Society, Galesburg

• Barrington Area Historical Society, Barrington
• Lake County Genealogical Society, Mundelein
• Lakes Region Historical Society and Museum, 817 N. Main, PO Box 240, Antioch, IL 60003
• Warren Township Historical Society, Gurnee
• Waukegan Historical Society, Waukegan
• Zion Genealogical Society, 2400 Gabriel Ave, Zion, IL 60099

• Earlville Community Historical Society, Earlville; Maureen Corrigan, Director Earl Township Public Library for dates and times.
• LaSalle County Genealogy Guild, Ottawa

• Lawrence County Genealogical Society, Bridgeport

• Lee County Genealogical Society, Dixon
• Lee County Historical Society, Dixon

• 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 Genealogical & Historical Society, Lincoln; email
• Mt. Pulaski Township Historical Society, Mt. Pulaski

• Decatur Genealogical Society, Decatur; email
• Macon County Historical Society & Museum, Decatur

• Macoupin County Genealogical Society, Staunton
• Macoupin County Historical Society, PO Box 432 Breckenridge St, Carlinville IL 62626

• Madison County Genealogical Society, Edwardsville

• Marion County Genealogical & Historical Society, Box 342, Salem IL 62881

• City of Henry Historical & Genealogical Society, 610 North St, Henry IL 61537
• Marshall County Historical Society, Lacon

• Mason County Genealogical & Historical Society, Havana

• Massac County Genealogical Society, Metropolis

• McDonough County Genealogical Society, Macomb

• McHenry County Genealogical Society, Crystal Lake

• Lexington Genealogical & Historical Society, Inc., Lexington (Covers Livingston, McLean & Woodford Counties)
• McLean County Genealogical Society, Normal
• McLean County Historical Society, Bloomington

• Mercer County Genealogical & Historical Society, RR 2, Aledo IL 61231

• Monroe County Genealogical Society, Columbia

• Montgomery County Genealogical Society, Litchfield

• Jacksonville Area Genealogical & Historical Society, Jacksonville
• Meredosia Area Historical & Genealogical Society, PO Box 304, Meredosia IL 62665
• Morgan Area Genealogical Association, Jacksonville
• Waverly Genealogical & Historical Society, 157 E. Tremont, Waverly IL 62692

• Moultrie County Genealogical & Historical Society, Sullivan

• Ogle County Genealogical Society, PO Box 251, Oregon IL 61061

• Peoria Genealogical Society, Peoria

• Perry County Historical Society, 108 W. Jackson St, Pinckneyville IL 62274

• Piatt County Genealogical & Historical Society, Monticello

• Griggsville Area Genealogical & Historical Society, PO Box 75, Griggsville IL 62340
• Pike/Calhoun Genealogical Society, PO Box 104, Pleasant Hill IL 62366

• Putnam County Historical Society, Hennepin IL 61327

• Randolph County Genealogical Society, Chester

• Richland County Genealogical & Historical Society, PO Box 202, Olney IL 62450

• 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, PO Box 632, Moline IL 61265
• Rock Island County IL Genealogical Society, Rock Island

• Saline County Genealogical Society, PO Box 4, Harrisburg IL 62946

• Sangamon County Genealogical Society, Springfield

• Schuyler County Historical Jail Museum & Genealogical Center, 200 S. Congress, Rushville IL 62681

• Shelby County Genealogical & Historical Society, Shelbyville

• Freeburg Genealogical & Historical Society, PO Box 69, Freeburg IL 62243
• Marissa Genealogical & Historical Society, Marissa
• O'Fallon Historical Society, O'Fallon
• St Clair County Genealogical Society, Belleville
• St. Clair County Historical Society, Belleville

• Stark County Genealogical Society, Toulon

• 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 Genealogical Society, Pekin

• .

• Catlin Historical Society
• Illiana Genealogical & Historical Society, Danville

• Warren County Genealogical Society, PO Box 761, Monmouth IL 61462-0761
• Warren County Historical Society, RR 2, Avon IL 61415

• Washington County Historical Society, 326 S. Kaskaskia St, Nashville IL 62263

• Genealogy Society of White County IL
• White County Historical Society, Carmi

• Lyndon Historical Society, Lyndon
• 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

• 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
• Will/Grundy Genealogical Society, Wilmington

• Williamson County Historical Society, Marion

• Kishwaukee Genealogists, Rockford
• Winnebago & Boone Counties Genealogical Society, Rockford

• Lexington Genealogical & Historical Society, Inc. (Covers Livingston, McLean & Woodford Counties)