James G. Mason
- 1926 – New Jersey’s 3rd congressional district (I) – lost
- 1930 – United States Senate (New Jersey) (Special) (Proh.) – lost
James R. Mason
- 1970 – Illinois’ 11th congressional district (R) – lost
John Mason
- 1980 – Colorado’s 1st congressional district (L) – lost
Kermit R. Mason
- 1952 – West Virginia’s 2nd congressional district (R) – lost
Mia Mason
- 2020 – Maryland’s 1st congressional district (D) – lost
Michael Mason
- 2014 – Illinois’ 6th congressional district (D) – lost
Mrs. William H. Mason
- 1926 – Kentucky’s 1st congressional district (R) – lost
Noah Morgan Mason
- 1936 – Illinois’ 12th congressional district (R) – won
- 1938 – Illinois’ 12th congressional district (R) – won
- 1940 – Illinois’ 12th congressional district (R) – won
- 1942 – Illinois’ 12th congressional district (R) – won
- 1944 – Illinois’ 12th congressional district (R) – won
- 1946 – Illinois’ 12th congressional district (R) – won
- 1948 – Illinois’ 15th congressional district (R) – won
- 1950 – Illinois’ 15th congressional district (R) – won
- 1952 – Illinois’ 15th congressional district (R) – won
- 1954 – Illinois’ 15th congressional district (R) – won
- 1956 – Illinois’ 15th congressional district (R) – won
- 1958 – Illinois’ 15th congressional district (R) – won
- 1960 – Illinois’ 15th congressional district (R) – won
Steiner Mason
- 1950 – New Mexico’s at large congressional district (R) – lost
Thomas Mason
- 2000 – Illinois’ 13th congressional district (D) – lost
- 2002 – Illinois’ 13th congressional district (D) – lost
Tony Mason
- 1976 – Arizona’s 4th congressional district (D) – lost
William Ernest Mason
- 1920 – Illinois’ at large congressional district (R) – won
William Kennedy Mason
- 1936 – Massachusetts’ 8th congressional district (Townsend, Social Justice) – lost
Kevin Masrud
- 2008 – Minnesota’s 2nd congressional district (W/I) – lost
Eric James Joseph Massa
- 2006 – New York’s 29th congressional district (D, WF) – lost
- 2008 – New York’s 29th congressional district (D, WF) – won
Dan Massey
- 2010 – Maryland’s 6th congressional district (L) – lost
Frank Massey
- 1970 – Tennessee’s 3rd congressional district (I) – lost
Walt Massey
- 1998 – Tennessee’s 6th congressional district (R) – lost
William Massey
- 1970 – United States Senate (Washington) (SW) – lost
Robert E. Massi
- 1974 – United States Senate (New York) (SL) – lost
- 1980 – New York’s 20th congressional district (SL) – lost
Joseph F. Massidda
- 1932 – Massachusetts’ 7th congressional district (S) – lost
- 1934 – Massachusetts’ 7th congressional district (S) – lost
- 1936 – Massachusetts’ 7th congressional district (S) – lost
Raymond G. Massie
- 1984 – New Jersey’s 2nd congressional district (R) – lost
Thomas Harold Massie
- 2012 – Kentucky’s 4th congressional district (R) – won
- 2014 – Kentucky’s 4th congressional district (R) – won
- 2016 – Kentucky’s 4th congressional district (R) – won
- 2018 – Kentucky’s 4th congressional district (R) – won
- 2020 – Kentucky’s 4th congressional district (R) – won
- 2022 – Kentucky’s 4th congressional district (R) – won
John A. Massimilla
- 1976 – United States Senate (Delaware) (Proh.) – lost
Samuel Chapman Massingale
- 1934 – Oklahoma’s 7th congressional district (D) – won
- 1936 – Oklahoma’s 7th congressional district (D) – won
- 1938 – Oklahoma’s 7th congressional district (D) – won
- 1940 – Oklahoma’s 7th congressional district (D) – won
Brian Jeffrey Mast
- 2016 – Florida’s 18th congressional district (R) – won
- 2018 – Florida’s 18th congressional district (R) – won
- 2022 – Florida’s 21st congressional district (R) – won
Yates Mast
- 1974 – Pennsylvania’s 23rd congressional district (D) – lost
Blake Gates Masters
- 2022 – United States Senate (Arizona) (R) – lost
Harold Masters
- 1968 – Missouri’s 5th congressional district (R) – lost
Ira H. Masters
- 1940 – Idaho’s 2nd congressional district (D) – lost
- 1942 – Idaho’s 2nd congressional district (D) – lost
John Masters
- 1986 – United States Senate (Iowa) (Nominated by Petition) – lost
Mark R. Masterson
- 1982 – New York’s 28th congressional district (RTL) – lost
- 1984 – New York’s 28th congressional district (RTL) – lost
- 1986 – New York’s 28th congressional district (R, CON, RTL) – lost
Steve Masterson
- 1992 – Texas’ 24th congressional district (R) – lost
George E. Mastics
- 1974 – Ohio’s 23rd congressional district (R) – lost
H. A. Mastin
- 1944 – Kentucky’s 8th congressional district (Proh.) – lost
Nicholas S. Mastorelli
- 1978 – New Jersey’s 9th congressional district (D) – lost
Elaine R. Mastromatteo
- 2012 – Ohio’s 14th congressional district (G) – lost
Miriam J. Masullo
- 2002 – Connecticut’s 1st congressional district (W/I) – lost
Joseph A. Masur
- 1964 – New York’s 22nd congressional district (Liberal) – lost
Agustin Mata
- 1978 – Texas’ 23rd congressional district (La Raza Unida) – lost
Jason Mata
- 2020 – Texas’ 35th congressional district (I) – lost
Jeff Matemu
- 2018 – North Carolina’s 2nd congressional district (L) – lost
- 2020 – North Carolina’s 2nd congressional district (L) – lost
Ben J. Mates
- 2014 – Utah’s 3rd congressional district (I) – lost
Ken Mathenia
- 2006 – Michigan’s 5th congressional district (G) – lost
- 2008 – Michigan’s 5th congressional district (G) – lost
Dana Matheny
- 2014 – Tennessee’s 8th congressional district (I-W/I) – lost
M. F. Matheny
- 1936 – West Virginia’s 6th congressional district (R) – lost
Lewis H. Mather
- 1940 – Kentucky’s 4th congressional district (R) – lost
Clyde J. Matherly
- 1936 – Oklahoma’s 7th congressional district (R) – lost
Albert N. Mathers
- 1934 – Nebraska’s 5th congressional district (R) – lost
Hugh T. Mathers
- 1924 – Ohio’s 4th congressional district (D) – lost
J. H. Matheson
- 1932 – Montana’s 2nd congressional district (D) – lost
