- 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
- Richard E. Neal Representative from MA, Democratic
- Joe Neguse Representative from CO, Democratic
- Troy E. Nehls Representative from TX, Republican
- Dan Newhouse Representative from WA, Republican
- Donald Norcross Representative from NJ, Democratic
- Ralph Norman Representative from SC, Republican
- Eleanor Holmes Norton Representative from DC, Democratic
- Zachary Nunn Representative from IA, Republican
- Jay Obernolte Representative from CA, Republican
- Alexandria Ocasio-Cortez Representative from NY, Democratic
- Andrew Ogles Representative from TN, Republican
- Johnny Olszewski Representative from MD, Democratic
- Ilhan Omar Representative from MN, Democratic
- Robert F. Onder Representative from MO, Republican