• History of Illinois by period‎ (4 C)
• Pre-statehood history of Illinois‎ (9 C, 43 P)
• Histories of cities in Illinois‎ (4 C, 1 P)

A

• African-American history of Illinois‎ (8 C, 26 P)
• Illinois in the American Civil War‎ (3 C, 26 P)

C

• Coal Wars‎ (32 P, 1 F)
• History of colleges and universities in Illinois‎ (4 P)
• History of Cook County, Illinois‎ (4 C, 1 P)
• Criminals from Illinois‎ (4 C, 41 P)

D

• Defunct amusement parks in Illinois‎ (9 P)
• Defunct organizations based in Illinois‎ (4 C, 4 P)
• Disasters in Illinois‎ (5 C, 7 P)

E

• Economic history of Illinois‎ (1 C)
• Electoral history of politicians from Illinois‎ (7 P)

F

• Illinois folklore‎ (1 C, 6 P)
• Former buildings and structures in Illinois‎ (11 C)
• Former municipalities in Illinois‎ (20 P)
• Former populated places in Illinois‎ (4 C, 42 P)

H

• Hispanic and Latino American history of Illinois‎ (2 C)
• Historians of Illinois‎ (4 P)
• Historic sites in Illinois‎ (11 C)
• Historic trails and roads in Illinois‎ (2 C, 11 P)
• Historical societies in Illinois‎ (6 P)
• History museums in Illinois‎ (3 C, 48 P)
• History of racism in Illinois‎ (3 C, 13 P)

L

• Labor disputes in Illinois‎ (1 C, 23 P)
• Legal history of Illinois‎ (1 C, 21 P)
• LGBT history in Illinois‎ (1 C, 10 P)
• Lynching deaths in Illinois‎ (13 P)

M

• Defunct mass media in Illinois‎ (2 C, 45 P)
• Military history of Illinois‎ (2 C)

N

• Native American history of Illinois‎ (12 C, 27 P)

P

• Political history of Illinois‎ (9 C, 10 P)

R

• Riots and civil disorder in Illinois‎ (1 C, 22 P)

S

• Scandals in Illinois‎ (1 C, 3 P)
• Skokie Controversy‎ (9 P)
• History of St. Clair County, Illinois‎ (1 C, 5 P)

U

• Underground Railroad in Illinois‎ (15 P)

W

• Wars involving Illinois‎ (4 C, 5 P)
• History of women in Illinois‎ (4 C, 60 P)

• History of Illinois

A

• Altgeld's castles
• Apollo (1906 automobile)

B

• Rod Blagojevich corruption charges

C

• Canal Scrip Fraud
• Centralia Baptist Association
• Chicago Athletic Association
• Christ Community Church
• Crenshaw House (Gallatin County, Illinois)
• John Crenshaw

D

• John Deere House and Shop

F

• First Treaty of Prairie du Chien

H

• List of historical sites related to the Illinois labor movement
• History of Nauvoo, Illinois
• Hofmann Tower
• List of homicides in Illinois

I

• Icarians
• Illinois and Michigan Canal
• Illinois Historic Preservation Division
• List of Illinois placenames of Native American origin
• Illinois State Historical Society
• Illinois v. Perkins

J

• History of the Jews in Illinois
• Journey to New Switzerland

L

• List of first minority male lawyers and judges in Illinois
• Lincoln/Net
• List of Illinois suffragists

M

• Metamora Courthouse State Historic Site
• Midland Motor Company

P

• Paper hanger (Mundelein's speech)
• Partin Manufacturing Company (automobile company)
• Pineapple Primary
• Postville Courthouse State Historic Site

S

• Sag Bridge, Illinois
• Shelton Brothers Gang
• Shire Site
• Southern Illinois
• Steamboats of the Mississippi

T

• Timeline of Vermilion County, Illinois history
• Third Treaty of Prairie du Chien
• Second Treaty of Prairie du Chien

W

• Wabokieshiek
• Western Tool Works (automobile company)