en 2021 in Illinois

Decades:	2000s; 2010s; 2020s; ; ;
See also:	History of Illinois; Historical outline of Illinois; List of years in Illinois; 2021 in the United States;

Incumbents

January 9 - Jason Nightengale shot and killed five people during a shooting spree that began on Chicago's South Side and ended in Evanston.^[1]
March 29 - Adam Toledo was shot and killed by Chicago Police Department officer Eric Stillman in the Little Village neighborhood on the West Side of Chicago.^[2]
March 31 - Anthony Alvarez, was shot and killed by a Chicago Police Department officer in the Portage Park neighborhood on the Northwest Side of Chicago.^[3]
June 14 - A maintenance accident at the Chemtool Incorporated manufacturing plant in Rockton triggered a chemical fire that lasted four days and injured two emergency workers.^[4]
August 31 - A mass shooting occurred at a mobile home park in Normal that left three people dead and three more injured.^[5]
November 9 - Zheng Shaoxiong was fatally shot by Alton Spann in Hyde Park.^[6]
December 10 - An EF3 tornado touched down near Pontoon Beach and tracked north towards Edwardsville. It hit an Amazon warehouse, killing 6 and injuring 1.^[7]