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U.S. House of Representatives, 119th Congress

Illinois's 15th Congressional District

As of October 19, 2026, Illinois's 15th congressional district (IL-15) is represented in the U.S. House of Representatives by Mary Miller, a Republican who has served in the House since 2021. The seat is on the ballot on Tuesday, November 3, 2026, as every House seat is every two years; the current term ends January 3, 2027. As of Monday, October 19, 2026, Election Day is 15 days away. Referandom does not list candidates; the Illinois election office publishes them.

Representative Serving Now

How Did Mary Miller Vote?

As of September 16, 2026, Mary Miller (R-IL) has voted Yea or Nay on 315 of the 335 bills and resolutions that came to a deciding roll call in the House in the 119th Congress and missed 20 (6%). Miller voted with the majority of Republicans 89% of the time.

From the roll calls of the Clerk of the House. Every Vote by Mary E. Miller →

On the Ballot November 3, 2026

  • The seat is on the ballot on Tuesday, November 3, 2026, as every House seat is every two years; the current term ends January 3, 2027.
  • Referandom does not list candidates, polls or forecasts; the Illinois election office publishes the candidates.
  • District lines are drawn by each state and can change between elections. This is the district of the 119th Congress; the state or local election office can tell you which district you vote in.

2026 Elections in Illinois → Every Seat on the Ballot in 2026 →

Other Districts in Illinois

Illinois's Senators

Senators represent the whole state, every district alike.

Questions About Illinois's 15th Congressional District

  • Who Represents Illinois's 15th Congressional District?

    As of October 19, 2026, Illinois's 15th congressional district (IL-15) is represented in the U.S. House of Representatives by Mary Miller, a Republican who has served in the House since 2021.

  • Is Illinois's 15th Congressional District on the Ballot in 2026?

    Yes. The seat is on the ballot on Tuesday, November 3, 2026, as every House seat is every two years; the current term ends January 3, 2027. Referandom does not list candidates; the Illinois election office publishes them.

  • How Did Mary Miller Vote?

    As of September 16, 2026, Mary Miller (R-IL) has voted Yea or Nay on 315 of the 335 bills and resolutions that came to a deciding roll call in the House in the 119th Congress and missed 20 (6%). Miller voted with the majority of Republicans 89% of the time.

  • How Many Congressional Districts Does Illinois Have?

    Illinois has 17 congressional districts in the 119th Congress, each with one seat in the House of Representatives. Its senators are Richard J. Durbin (D) and Tammy Duckworth (D).

More About Illinois in Congress

Members, seats and terms from Congress.gov, the Clerk of the House and the congress-legislators project; votes from the Clerk's roll calls, current through .

Cite This Page

Referandom. (2026, September 16). Illinois's 15th Congressional District: Who Represents It. CDR Technology Foundation, Inc. Retrieved October 19, 2026, from https://www.referandom.us/districts/il-15