The district covers parts of Cook, DuPage, Lake, Kane and McHenry counties.
Democrat Sean Casten is challenging Republican incumbent Peter Roskam.
Roskam is currently in his sixth term.
Newsviews Part 1: Race for Illinois' 6th Congressional District
Before going to Washington, Peter Roskam served in both the Illinois House and Senate.
Democrat Sean Casten is a scientist and businessman with degrees in molecular biology and biochemistry.
Newsviews Part 2: Race for Illinois' 6th Congressional District
He co-founded Recycled Energy Development which works to reduce greenhouse gas emissions.