- Max L. Miller Representative from OH, Republican
- Mariannette Miller-Meeks Representative from IA, Republican
- Cory Mills Representative from FL, Republican
- Marcus J. Molinaro Representative from NY, Republican
- John R. Moolenaar Representative from MI, Republican
- Alexander X. Mooney Representative from WV, Republican
- Barry Moore Representative from AL, Republican
- Blake D. Moore Representative from UT, Republican
- Gwen Moore Representative from WI, Democratic
- Nathaniel Moran Representative from TX, Republican
- Joseph D. Morelle Representative from NY, Democratic
- Jared Moskowitz Representative from FL, Democratic
- Seth Moulton Representative from MA, Democratic
- James C. Moylan Representative from GU, Republican
- Frank J. Mrvan Representative from IN, Democratic
- Kevin Mullin Representative from CA, Democratic
- Gregory F. Murphy Representative from NC, Republican
- Jerrold Nadler Representative from NY, Democratic
- Grace F. Napolitano Representative from CA, Democratic
- Richard E. Neal Representative from MA, Democratic