The polls closed a little later Tuesday night than usual, which meant results came in late and overnight.
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It was a historic night for women. In south suburban Flossmoor, Michelle Nelson won with 58% of the vote, becoming the first female mayor in the town's nearly 100-year- history.
In Dolton, Tiffany Henyard- a senior village trustee, becomes the first woman mayor there winning 82 percent of the vote.
Breaking down Illinois suburban elections
In Oak Park, voters decided not to defund the police department, with 68% voting no and 31% voting yes.
In Crestwood, Mayor Lou Presta won re-election with 62 percent of the vote despite being charged federally in a bribery scam involving red light cameras.
In Lyons, incumbent Mayor Chris Getty won again with 69 percent of the vote even though he was accused in a federal corruption investigation.
In Aurora, Mayor Richard Irvin keeps his seat as the first African American mayor of Aurora. He won re-election with 53 percent of the vote.
In Willow Springs, Melissa Neddermeyer becomes the first female mayor in the town's 129 year history. Neddermeyer is a 40-year-old lawyer who served on the board of trustees for four years -she ran unopposed.
More than 30 Cook County precincts had permission to stay open for an additional hour for voting.