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Polls closed at 7 p.m. in Illinois on Election Day.
Election Day 2024: See live results, analysis and national voting maps
President and Vice President
Vice President Kamala Harris and Minnesota Gov. Tim Walz are running on the Democratic ticket, while former president Donald Trump and Ohio Sen. JD Vance are running on the Republican ticket.
The race for the White House is still very tight, with the latest ABC News/Ipsos poll out Sunday showing Kamala Harris slightly ahead nationally, but Donald Trump ahead in some key swing states, and the two candidates deadlocked in Pennsylvania.
ABC News projects Harris will win Illinois.
Locally, many Democratic leaders are expressing confidence in the outcome Tuesday night, even as local efforts continue to try and impact neighboring swing states for Harris.
Republicans are more focused on state races.
Many followed the Election Day tradition of gathering at Manny's Deli while the last of the voters are heading to the polls.
At Manny's, Democrats were full of smiles, posing for pictures.
But leaders are still encouraging people to get to the polls.
"I want to remind everyone that your vote matters," Illinois Democratic Party Chair Lisa Hernandez said.
Some of the Democratic optimism stems from the local efforts in Operation Swing State, which has sent scores of volunteers to Wisconsin and Michigan to campaign for Harris.
"The outpouring of strength and support by Illinois Democrats in Wisconsin and Michigan and even Pennsylvania is going to make the difference," Sen. Dick Durbin said. "After all the hours and days and weeks and months you put into a campaign, it comes down to this period of time when the polls are open and the voters have the last word, as they should."
Gov. JB Pritzker stopped by Manny's with the first lady, encouraged by the energy surrounding the Harris-Walz campaign.
"I feel very good, cautiously optimistic; things look good at all the battleground states today. Voter turnout is very, very good," Pritzker said.
Illinois Republicans are countering with their own sense of hopeful confidence.
"Cautiously optimistic. You know, I'm a suburban woman, a suburban mom, and I proudly voted the hope of tomorrow, which is President Trump," Illinois Republican Party Chair Kathy Salvi said.
Republicans are hoping the economy will work in their favor.
"Everybody's hurting. Illinois families are hurting. Workers are hurting. People are having to take two or three jobs just to make ends meet, and they see it at the grocery store, at the gas pump," Salvi said.
There is a sense among many Democrats that the election night menus might call for a side of patience.
"Unless we win Georgia or North Carolina tonight, I do not believe that we'll know who's the president of the United States is tonight. I think we'll find out Thursday or Friday. I think Pennsylvania might take some time to come in," 26th Ward Ald. Jesse Fuentes said.
Democrats are counting on their ground game to lead to victory.
"Well, we as Democrats believe on knocking on doors and talking to people personally, and we do that here in Illinois. And we have in this cycle done that in a lot of places, in Wisconsin and Michigan, and I think, as I said, that'll make the difference," Cook County President Toni Preckwinkle said. "I'm cautiously optimistic. I've gone from sort of worried but to cautiously optimistic. I think that the difference in this election is going to be the votes of women."
Lines at polling places remained long all day long, with voters determined to have their say in the outcome.
In Lakeview, Democratic Party leaders were doing some phone banking in the closing hours of the election, trying to impact any last-minute voters who had not yet gone to the polls in Michigan and Wisconsin.
Many Democrats plan to stop by the party's election night watch party in River North Tuesday night. Some are predicting a Harris landslide, but most are tempering their hopes, at least publicly.
"I mean, I feel pretty positive. I mean, no matter what happens tonight, and my belief is, I think we're going to win this election," said state Sen. Robert Peters, D-Chicago.
Trump, voting earlier Tuesday, expressed confidence in his campaign.
"Look, I ran a great campaign. I think it was maybe the best of the three," Trump said.
Trump and Harris spent the final days of the campaign in Pennsylvania, considered perhaps the most important swing state.
Harris stopped by Democratic National Committee headquarters Tuesday afternoon.
"We have all these volunteers; you'll be really excited to know there's a lot of young people who are here," Harris said.
ABC News projects Trump will win Indiana.
Indiana also voted on a new governor Tuesday night. Governor Eric Holcomb is term-limited.
Republican Mike Braun has won the Indiana governor's race.
RELATED COVERAGE: What you need to know about the Electoral College as 2024 race nears end
Neighboring Michigan and Wisconsin are considered crucial swing states for both parties. Both Trump and Harris made numerous appearances in both in the final days of their campaign, drumming up support and turnout for contests that could be decided by just a few thousands votes.
Congress
The battle for control of the US House of Representatives rests on a knife's edge, with a historically small universe of competitive races poised to determine the chamber's majority in the next Congress - an outcome that could have far-reaching consequences for the next president's agenda.
All 435 House seats are on the ballot, with Republicans defending a slim majority and Democrats needing a net gain of four seats to flip control of the chamber. There is a clear consensus among both parties that whichever side emerges with a majority is likely to have little room to spare. A single-seat majority is not outside the realm of possibility.
Senate control also is up for grabs Tuesday. And although Republicans are well positioned to win the majority, Democrats cannot be counted out entirely, because their well-funded candidates have consistently overperformed the top of the ticket in polling of many of the most important races.
Cook County State's Attorney
Perhaps the closest-watched local 2024 race is for Cook County state's attorney. After Kim Foxx announced she would not seek reelection, there was an extremely tight primary for Democrats Eileen O'Neill Burke and Clayton Harris III. O'Neill Burke won the primary by only 1,556 votes.
O'Neill Burke declared victory Tuesday night and Fioretti conceded the race shortly after.
She faced Republican Bob Fioretti in the race to become Cook County's top prosecutor. Recently, both candidates sat down with ABC7 Chicago to lay out their vision and priorities should they win election.
Chicago School Board
For the first time in city history, Chicago voters will be able to elect 10 members to form the first elected Chicago school board. These 10 elected members will be joined by 11 handpicked by the mayor to form the complete Chicago Board of Education.
Some districts have 10 or more candidates vying for the single district seat.
Counties are colored red or blue when the % expected vote reporting reaches a set threshold. This threshold varies by state and is based on patterns of past vote reporting and expectations about how the vote will report this year.
ABC News and the CNN Wire contributed to this report