The 2026 general election for U.S. House Illinois District 15 will be held on November 3, 2026, to determine the representative for Illinois's 15th congressional district in the U.S. House of Representatives. This district covers parts of central and southern Illinois, including the cities of Champaign, Urbana, and parts of Springfield, and is currently represented by Republican Mary Miller.
About This Race
The 2026 general election for U.S. House Illinois District 15 will be held on November 3, 2026, to determine the representative for Illinois's 15th congressional district in the U.S. House of Representatives. This district covers parts of central and southern Illinois, including the cities of Champaign, Urbana, and parts of Springfield, and is currently represented by Republican Mary Miller.
Candidates
Important Dates
Election Date
November 3, 2026
Registration Deadline
October 8, 2026
Early Voting Starts
October 27, 2026
Early Voting Ends
November 1, 2026
How to Vote
To vote in Illinois, residents must register by October 8, 2026, either online via the Illinois State Board of Elections website, by mail, or in person at their local election office. On Election Day, November 3, 2026, voters can cast ballots at their designated polling place from 6:00 AM to 7:00 PM CST; early voting is available from October 27 to November 1, 2026, at designated sites, and vote-by-mail ballots must be requested by November 1 and postmarked by Election Day. Voters are required to show a valid ID if voting for the first time in their jurisdiction or if requested by an election judge, though no photo ID is strictly required for most voters under current Illinois law.
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Incumbent
Republican
Mary Miller
U.S. Representative for Illinois's 15th congressional district
Biography
Mary Miller is a Republican incumbent first elected to Congress in 2020, representing Illinois's 15th district. She is a former small business owner and educator who focuses on conservative fiscal policies, agricultural support, and limiting federal overreach, and is running for re-election to continue advocating for rural Illinois interests in Washington.
U.S. Representative for Illinois's 15th congressional district
Biography
David Gill is a Democratic challenger and physician from Bloomington, Illinois, running to unseat incumbent Mary Miller in the 15th district. He previously ran for Congress in 2012 and 2014, advocating for expanded healthcare access, economic investment in downstate Illinois, and environmental protections, and is campaigning on a platform of rebuilding middle-class opportunity and restoring bipartisan problem-solving in Congress.
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