The Library has a vast amount of information pertaining to Illinois history. This page (and its subpages) contains information specific to Illinois counties, particularly county-specific call numbers, subject headings, histories, and atlases. However, you can also find plenty of information about Illinois under the tabs for Using the Library, United States, and Web Resources.

In particular, you can find other county-specific information by looking for:

• Illinois County Bibliography, which is shelved with 016.9773
• Browse by call number: Illinois history is shelved in the Dewey range 977.31 – 977.39

To find information about a specific county, look for it in one of the lists below, or use the dropdown menu to browse by first letter. (If you are unsure in which county your city or town is located, please consult this Wikipedia list of Illinois cities.)

On each county's page, we have provided a sample of resources our library holds. You can investigate further using the call numbers and links provided to expand your search.

Three online resources that will be especially useful are:

A

Adams County (Quincy)
Alexander County (Cairo)
    
B

Bond County (Greenville)
Boone County (Belvidere)
Brown County (Mount Sterling)
Bureau County (Princeton)

C

Calhoun County (Hardin)
Carroll County (Mount Carroll)
Cass County (Virginia)
Champaign County (Urbana)
Christian County (Taylorville)
Clark County (Marshall)
Clay County (Louisville)
Clinton County (Carlyle)
Coles County (Charleston)
Cook County (Chicago)
Crawford County (Robinson)
Cumberland County (Toledo)
    
D    

DeKalb County (Sycamore)
De Witt County (Clinton)
Douglas County (Tuscola)
DuPage County (Wheaton)
    
E    

Edgar County (Paris)
Edwards County (Albion)
Effingham County (Effingham)
    
F    

Fayette County (Vandalia)
Ford County (Paxton)
Franklin County (Benton)
Fulton County (Lewistown)
    
G    

Gallatin County (Shawneetown)
Greene County (Carrollton)
Grundy County (Morris)

H    

Hamilton County (McLeansboro)
Hancock County (Carthage)
Hardin County (Elizabethtown)
Henderson County (Oquawka)
Henry County (Cambridge)

I    

Iroquois County (Watseka)

J    

Jackson County (Murphysboro)
Jasper County (Newton)
Jefferson County (Mount Vernon)
Jersey County (Jerseyville)
Jo Daviess County (Galena)
Johnson County (Vienna)

K    
Kane County (Geneva)
Kankakee County (Kankakee)
Kendall County (Yorkville)
Knox County (Galesburg)

L    

Lake County (Waukegan)
LaSalle County (Ottawa)
Lawrence County (Lawrenceville)
Lee County (Dixon)
Livingston County (Pontiac)
Logan County (Lincoln)

M    

Macon County (Decatur)
Macoupin County (Carlinville)
Madison County (Edwardsville)
Marion County (Salem)
Marshall County (Lacon)
Mason County (Havana)
Massac County (Metropolis)
McDonough County (Macomb)
McHenry County (Woodstock)
McLean County (Bloomington)
Menard County (Petersburg)
Mercer County (Aledo)
Monroe County (Waterloo)
Montgomery County (Hillsboro)
Morgan County (Jacksonville)
Moultrie County (Sullivan)

O    

Ogle County (Oregon)

P    

Peoria County (Peoria)
Perry County (Pinckneyville)
Piatt County (Monticello)
Pike County (Pittsfield)
Pulaski County (Mound City)
Putnam County (Hennepin)

R    

Randolph County (Chester)
Richland County (Olney)
Rock Island County (Rock Island)

S    

Saint Clair County (Belleville)
Saline County (Harrisburg)
Sangamon County (Springfield)
Schuyler County (Rushville)
Scott County (Winchester)
Shelby County (Shelbyville)
Stark County (Toulon)
Stephenson County (Freeport)

T    

Tazewell County (Pekin)

U    

Union County (Jonesboro)

V    

Vermilion County (Danville)

W    

Wabash County (Mount Carmel)
Warren County (Monmouth)
Washington County (Nashville)
Wayne County (Fairfield)
White County (Carmi)
Whiteside County (Morrison)
Will County (Joliet)
Williamson County (Marion)
Winnebago County (Rockford)
Woodford County (Eureka)

These listings correspond to the system used by the Illinios Regional Archives Depository System.

Northeastern Illinois

    Cook

Northern Illinois

    Boone
    Bureau
    Carroll
    DeKalb
    DuPage
    Jo Daviess
    Kane
    Kendall
    Lake
    LaSalle
    Lee
    McHenry
    Ogle
    Putnam
    Stephenson
    Whiteside
    Will
    Winnebago
    

Western Illinois

    Adams
    Brown
    Calhoun
    Fulton
    Hancock
    Henderson
    Henry
    Knox
    McDonough
    Mercer
    Peoria
    Pike
    Rock Island
    Schuyler
    Stark
    Warren
    

East Central (Illinois State)

    Champaign
    DeWitt
    Ford
    Grundy
    Iroquois
    Kankakee
    Livingston
    Logan
    Marshall
    McLean
    Piatt
    Tazewell
    Vermillion
    Woodford
    

Central (University of Illinois, Springfield)

    Bond
    Cass
    Christian
    Fayette
    Greene
    Jersey
    Macon
    Macoupin
    Mason
    Menard
    Montgomery
    Morgan
    Sangamon
    Scott
    

Southeastern (Eastern Illinois)

    Clark
    Clay
    Coles
    Crawford
    Cumberland
    Douglas
    Edgar
    Edwards
    Effingham
    Jasper
    Lawrence
    Marion
    Moultrie
    Richland
    Shelby
    Wabash
    Wayne
    

Southern Illinois

    Alexander
    Bond
    Clinton
    Franklin
    Gallatin
    Hamilton
    Hardin
    Jackson
    Jefferson
    Johnson
    Madison
    Massac
    Monroe
    Perry
    Pope
    Pulaski
    Randolph
    Saline
    St. Clair
    Union
    Washington
    White
    Williamson