The Democratic Party made gains, including picking up the state's governorship and flipping two of its U.S. House seats.

After the election, all executive offices and control of the Illinois General Assembly was held by the Democratic Party.

[4] The Illinois State Board of Elections also reported that the total number of votes cast set a record high.

[5] Turnout by county[3] All of Illinois' 18 seats in the United States House of Representatives were up for election in 2018.

Incumbent Republican Governor Bruce Rauner ran for re-election to a second term, but was defeated by Democratic venture capitalist and billionaire J.

A special election was held in 2016 for the remainder of the term, with Democratic City Clerk of Chicago Susana Mendoza defeating appointed Republican Comptroller Leslie Munger.