This list includes notable homicides committed in the U.S. state of Illinois that have a Wikipedia article on the killing, the killer, or the victim.
It is divided into five subject areas as follows: This article does not include military battles fought in Illinois.
Such battles, including battles fought during the Black Hawk War, may be found at List of battles fought in Illinois.
This article also does not include people who have been executed in Illinois.
Listed in chronological order Listed in chronological order by date of earliest homicide