- Doris O. Matsui Representative from CA, Democratic
- Lucy McBath Representative from GA, Democratic
- Sarah McBride Representative from DE, Democratic
- Michael T. McCaul Representative from TX, Republican
- Lisa C. McClain Representative from MI, Republican
- April McClain Delaney Representative from MD, Democratic
- Jennifer L. McClellan Representative from VA, Democratic
- Tom McClintock Representative from CA, Republican
- Betty McCollum Representative from MN, Democratic
- Richard McCormick Representative from GA, Republican
- Kristen McDonald Rivet Representative from MI, Democratic
- Addison P. McDowell Representative from NC, Republican
- Morgan McGarvey Representative from KY, Democratic
- James P. McGovern Representative from MA, Democratic
- John J. McGuire Representative from VA, Republican
- LaMonica McIver Representative from NJ, Democratic
- Gregory W. Meeks Representative from NY, Democratic
- Analilia Mejia Representative from NJ, Democratic
- Christian D. Menefee Representative from TX, Democratic
- Robert Menendez Representative from NJ, Democratic