Mary Miller is a member of the U.S. House, representing Illinois' 15th Congressional District. She assumed office on January 3, 2021. Her current term ends on January 3, 2027. Miller is running for re-election to the U.S. House to represent Illinois' 15th Congressional District. She is on the ballot in the general election on November 3, 2026. She advanced from the Republican primary on March 17, 2026.