Mark C. Alliegro
- 2016 – Massachusetts’ 9th congressional district (R) – lost
Clark Allis
- 1922 – New York’s 39th congressional district (Proh.) – lost
Gary D. Allison
- 1986 – Oklahoma’s 1st congressional district (D) – lost
Joy J. Allison
- 2016 – United States Senate (Hawaii) (C) – lost
M. Lawrence Allison
- 1998 – California’s 28th congressional district (NL) – lost
- 2000 – California’s 28th congressional district (NL) – lost
Roger Allison
- 2018 – North Carolina’s 1st congressional district (R) – lost
Timothy J. Allison
- 2010 – California’s 24th congressional district (D) – lost
A. D. Allissandratos
- 1976 – Tennessee’s 8th congressional district (R) – lost
Walter A. Allmendiger
- 1932 – Michigan’s 17th congressional district (S) – lost
- 1934 – Michigan’s 17th congressional district (S) – lost
- 1936 – Michigan’s 17th congressional district (S) – lost
- 1938 – Michigan’s 17th congressional district (S) – lost
- 1940 – Michigan’s 17th congressional district (S) – lost
Jack P. Allmon
- 1966 – South Dakota’s 2nd congressional district (D) – lost
Gordon Llewellyn Allott
- 1954 – United States Senate (Colorado) (R) – won
- 1960 – United States Senate (Colorado) (R) – won
- 1966 – United States Senate (Colorado) (R) – won
- 1972 – United States Senate (Colorado) (R) – lost
A. S. Allphin
- 1922 – Kansas’ 7th congressional district (D) – lost
- 1930 – Kansas’ 7th congressional district (D) – lost
Colin Zachary Allred
- 2018 – Texas’ 32nd congressional district (D) – won
- 2020 – Texas’ 32nd congressional district (D) – won
- 2022 – Texas’ 32nd congressional district (D) – won
Robert B. Allred
- 1976 – California’s 2nd congressional district (PF) – lost
Maria Allwine
- 2004 – United States Senate (Maryland) (G) – lost
Mark J. Almberg
- 1988 – Illinois’ 8th congressional district (Communist) – lost
John Almeida, Jr.
- 1958 – Massachusetts’ 9th congressional district (D) – lost
Edward Berton Almon
- 1920 – Alabama’s 8th congressional district (D) – won
- 1922 – Alabama’s 8th congressional district (D) – won
- 1924 – Alabama’s 8th congressional district (D) – won
- 1926 – Alabama’s 8th congressional district (D) – won
- 1928 – Alabama’s 8th congressional district (D) – won
- 1930 – Alabama’s 8th congressional district (D) – won
- 1932 – Alabama’s 8th congressional district (D) – won
James Lindsay Almond, Jr.
- 1946 – Virginia’s 6th congressional district (D) – won
Lincoln Carter Almond
- 1968 – Rhode Island’s 1st congressional district (R) – lost
Val Almonord
- 2020 – Georgia’s 3rd congressional district (D) – lost
- 2022 – Georgia’s 3rd congressional district (D) – lost
John W. Almquist
- 1986 – California’s 30th congressional district (R) – lost
Kim R. Almstron
- 1992 – California’s 18th congressional district (L) – lost
Fernando A. Alonso
- 1994 – New Jersey’s 13th congressional district (R) – lost
Michael J. Alonso
- 2010 – New Jersey’s 10th congressional district (R) – lost
Benjamin P. Alschuler
- 1968 – Illinois’ 15th congressional district (D) – lost
John A. Alston
- 1974 – New Jersey’s 14th congressional district (I) – lost
Herman G. Altenberger
- 1934 – Iowa’s 6th congressional district (S) – lost
- 1936 – Iowa’s 6th congressional district (S) – lost
Lois Ivers Altenburg
- 1984 – North Dakota’s at large congressional district (R) – lost
David Alter
- 1992 – Texas’ 23rd congressional district (L) – lost
P. J. Alter
- 1942 – Washington’s 1st congressional district (SL) – lost
James Altham, Jr.
- 1974 – Connecticut’s 3rd congressional district (R) – lost
Charles Althouse
- 1936 – Pennsylvania’s 14th congressional district (I) – lost
F. B. Althouse
- 1920 – Iowa’s 2nd congressional district (FL) – lost
Irving B. Altman
- 1940 – New York’s 6th congressional district (American Labor) – lost
Jack Altman
- 1938 – New York’s 10th congressional district (S) – lost
- 1940 – New York’s 23rd congressional district (American Labor) – lost
Sidney Altman
- 1990 – Maryland’s 8th congressional district (I) – lost
Jim Altmeyer
- 1984 – West Virginia’s 1st congressional district (R) – lost
Jason Altmire
- 2006 – Pennsylvania’s 4th congressional district (D) – won
- 2008 – Pennsylvania’s 4th congressional district (D) – won
- 2010 – Pennsylvania’s 4th congressional district (D) – won
Duane Alton
- 1976 – Washington’s 5th congressional district (R) – lost
- 1978 – Washington’s 5th congressional district (R) – lost
Jess Alton
- 1942 – Iowa’s 7th congressional district (D) – lost
Randolph Brody Altschuler
- 2010 – New York’s 1st congressional district (R, CON) – lost
- 2012 – New York’s 1st congressional district (R, CON, IND) – lost
Noah Altshuler
- 1936 – Pennsylvania’s 11th congressional district (S) – lost
Felix Alvarado
- 2002 – Texas’ 6th congressional district (D) – lost
- 2004 – Texas’ 12th congressional district (D) – lost
Jose Alvarado
- 1984 – Texas’ 18th congressional district (I) – lost
Simon Alvarado
- 2012 – Texas’ 35th congressional district (W/I) – lost
David A. Alvarez
- 1990 – Alabama’s 6th congressional district (I) – lost
Ida Alvarez
- 1952 – California’s 19th congressional district (Ind. Prog.) – lost
W. F. Alworth
- 1930 – Idaho’s 2nd congressional district (D) – lost
Antonio C. Amador
- 2014 – California’s 9th congressional district (R) – lost
- 2016 – California’s 9th congressional district (R) – lost
- 2020 – California’s 9th congressional district (R) – lost
