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Rep. Mary Miller

Representative for Illinois’s 15th District

pronounced MA-ree // MIH-ler

Miller is the representative for Illinois’s 15th congressional district (view map) and is a Republican. She has served since Jan 3, 2021. Miller is next up for reelection in 2024 and serves until Jan 3, 2025. She is 63 years old.

Elections must be decided by counting votes

Our work to hold Congress accountable only matters if elections are decided by counting votes. President Trump, his senior government advisors, and Republican legislators collaborated to have the 2020 presidential election decided instead by incumbent politicians running in the very same election. Their attempts to suppress entire state-certified vote counts without adjudication in the courts and using a disinformation campaign of lies and conspiracy theories was a months-long, multifarious attempted coup.

Miller was among the Republican legislators who participated in the attempted coup. On January 6, 2021 in the hours after the violent insurrection at the Capitol, Miller voted to reject the state-certified election results of Arizona and/or Pennsylvania (states narrowly won by Democrats), which could have changed the outcome of the election. These legislators pumped the lies and preposterous legal arguments about the election that motivated the January 6, 2021 violent insurrection at the Capitol. The January 6, 2021 violent insurrection at the Capitol, led on the front lines by militant white supremacy groups, attempted to prevent President-elect Joe Biden from taking office by disrupting Congress’s count of electors.


In the summer of 2021, Rep. Miller was fined for failing to wear a mask on the House floor during the COVID-19 pandemic. Miller's appeal was rejected.

Aug. 2, 2021 Miller was fined by the Sergeant at Arms.
Aug. 25, 2021 Miller appealed the fine.
Sep. 28, 2021 House Committee on Ethics announced that Miller had appealed the fine, but the appeal was rejected
Photo of Rep. Mary Miller [R-IL15]


Legislative Metrics

Read our 2022 Report Card for Miller.

Ideology–Leadership Chart

Miller is shown as a purple triangle in our ideology-leadership chart below. Each dot is a member of the House of Representatives positioned according to our ideology score (left to right) and our leadership score (leaders are toward the top).

The chart is based on the bills Miller has sponsored and cosponsored from Jan 3, 2019 to Mar 30, 2023. See full analysis methodology.

Committee Membership

Mary Miller sits on the following committees:

Bills Sponsored

Issue Areas

Miller sponsors bills primarily in these issue areas:

Education (40%) Environmental Protection (20%) Armed Forces and National Security (20%) Immigration (20%)

Recently Introduced Bills

Miller recently introduced the following legislation:

View All » | View Cosponsors »

Most legislation has no activity after being introduced.

Voting Record

Key Votes

Miller voted Yea

Miller voted Nay

Passed 360/64 on Sep 22, 2022.

Miller voted Nay

Miller voted Yea

Miller voted Nay

Miller voted Nay

Miller voted Nay

Missed Votes

From Jan 2021 to Mar 2023, Miller missed 88 of 1,180 roll call votes, which is 7.5%. This is much worse than the median of 1.6% among the lifetime records of representatives currently serving. The chart below reports missed votes over time.

We don’t track why legislators miss votes, but it’s often due to medical absenses, major life events, and running for higher office.

Show the numbers...

Primary Sources

The information on this page is originally sourced from a variety of materials, including: