Peggy S. McKerlie
- 1998 – Washington’s 4th congressional district (Ref.) – lost
John Rettie McKernan, Jr.
- 1982 – Maine’s 1st congressional district (R) – won
- 1984 – Maine’s 1st congressional district (R) – won
James Douglas McKevitt
- 1970 – Colorado’s 1st congressional district (R) – won
- 1972 – Colorado’s 1st congressional district (R) – lost
Larry E. McKibben
- 1998 – Iowa’s 3rd congressional district (R) – lost
George B. McKibbin
- 1956 – Illinois’ 2nd congressional district (R) – lost
William McKie
- 1936 – Michigan’s 15th congressional district (FL) – lost
Darrell McKigney
- 1996 – Minnesota’s 7th congressional district (R) – lost
Burlin G. McKillip
- 1940 – New York’s 30th congressional district (D) – lost
- 1942 – New York’s 30th congressional district (D) – lost
George W. McKim
- 1958 – New Mexico’s at large congressional district (R) – lost
Edwin S. McKin
- 1936 – Pennsylvania’s 4th congressional district (Commonwealth) – lost
Richard F. McKiniry
- 1920 – New York’s 23rd congressional district (D) – lost
Breck McKinley
- 1986 – United States Senate (California) (L) – lost
C. L. McKinley
- 1972 – United States Senate (Mississippi) (I) – lost
David Bennett McKinley
- 2010 – West Virginia’s 1st congressional district (R) – won
- 2012 – West Virginia’s 1st congressional district (R) – won
- 2014 – West Virginia’s 1st congressional district (R) – won
- 2016 – West Virginia’s 1st congressional district (R) – won
- 2018 – West Virginia’s 1st congressional district (R) – won
- 2020 – West Virginia’s 1st congressional district (R) – won
Douglas McKinley
- 2020 – Washington’s 4th congressional district (D) – lost
James McKinley
- 1962 – New Jersey’s 7th congressional district (I) – lost
Jerry McKinley
- 2010 – Maryland’s 3rd congressional district (L) – lost
Kent S. McKinley
- 1952 – Florida’s 7th congressional district (R) – lost
Lee Lawrence McKinley
- 1960 – United States Senate (Alaska) (R) – lost
- 1966 – United States Senate (Alaska) (R) – lost
Paul McKinley
- 2013 – Illinois’ 2nd congressional district (Special) (R) – lost
Robert B. McKinley
- 1938 – Pennsylvania’s 34th congressional district (R) – lost
- 1940 – Pennsylvania’s 34th congressional district (R) – lost
Wes McKinley
- 1996 – Colorado’s 4th congressional district (Americans) – lost
William Brown McKinley
- 1920 – United States Senate (Illinois) (R) – won
B. Z. McKinney
- 1932 – California’s 19th congressional district (D) – lost
Cynthia Ann McKinney
- 1992 – Georgia’s 11th congressional district (D) – won
- 1994 – Georgia’s 11th congressional district (D) – won
- 1996 – Georgia’s 4th congressional district (D) – won
- 1998 – Georgia’s 4th congressional district (D) – won
- 2000 – Georgia’s 4th congressional district (D) – won
- 2004 – Georgia’s 4th congressional district (D) – won
J. E. McKinney
- 1982 – Georgia’s 5th congressional district (I) – lost
Raymond McKinney
- 2010 – Georgia’s 12th congressional district (R) – lost
Stewart Brett McKinney
- 1970 – Connecticut’s 4th congressional district (R) – won
- 1972 – Connecticut’s 4th congressional district (R) – won
- 1974 – Connecticut’s 4th congressional district (R) – won
- 1976 – Connecticut’s 4th congressional district (R) – won
- 1978 – Connecticut’s 4th congressional district (R) – won
- 1980 – Connecticut’s 4th congressional district (R) – won
- 1982 – Connecticut’s 4th congressional district (R) – won
- 1984 – Connecticut’s 4th congressional district (R) – won
- 1986 – Connecticut’s 4th congressional district (R) – won
John McKinnis
- 2004 – Maryland’s 4th congressional district (R) – lost
Clinton Dotson McKinnon
- 1948 – California’s 23rd congressional district (D) – won
- 1950 – California’s 23rd congressional district (D) – won
William McKinnon
- 1944 – Minnesota’s 8th congressional district (DFL) – lost
James T. McKinstry
- 1960 – Delaware’s at large congressional district (R) – lost
Millard J. McKissack II
- 1992 – Tennessee’s 8th congressional district (I) – lost
Roy McKittrick
- 1944 – United States Senate (Missouri) (D) – lost
Martin Boswell McKneally
- 1968 – New York’s 27th congressional district (R) – won
- 1970 – New York’s 27th congressional district (R, CON) – lost
David P. McKnight
- 1990 – North Carolina’s 9th congressional district (D) – lost
Kathleen M. McKnight
- 1996 – Ohio’s 2nd congressional district (NL) – lost
Malcolm M. McKnight
- 1978 – Maryland’s 2nd congressional district (R) – lost
Patrick McKnight
- 2012 – New Jersey’s 7th congressional district (L) – lost
Mike McKool
- 1974 – Texas’ 5th congressional district (D) – lost
George H. McLain
- 1946 – United States Senate (California) (Special) (W/I) – lost
Harley J. McLain
- 1978 – North Dakota’s at large congressional district (I) – lost
- 1980 – United States Senate (North Dakota) (Chemical Farming Banned) – lost
- 1998 – United States Senate (North Dakota) (Ref.) – lost
Jack McLain
- 2002 – Florida’s 16th congressional district (C) – lost
- 2004 – Florida’s 22nd congressional district (C) – lost
John W. McLain
- 1930 – Illinois’ at large congressional district (American National) – lost
Patrick McLane
- 1920 – Pennsylvania’s 10th congressional district (D) – lost
- 1922 – Pennsylvania’s 11th congressional district (D) – lost
John McLaren
- 1936 – Massachusetts’ 10th congressional district (Townsend, Coughlin, Labor) – lost
Charles McLauchlan
- 1936 – California’s 19th congressional district (Comm.) – lost
Geri Knoll McLauchlan
- 1992 – Illinois’ 7th congressional district (NL) – lost
Blaine McLaughlin
- 1930 – Kentucky’s 6th congressional district (I) – lost
Bob McLaughlin
- 1960 – United States Senate (Idaho) (D) – lost
