Vincent J. Longhi
- 1946 – New York’s 12th congressional district (R, American Labor) – lost
- 1948 – New York’s 12th congressional district (American Labor) – lost
- 1950 – New York’s 12th congressional district (American Labor) – lost
Matt Longjohn
- 2018 – Michigan’s 6th congressional district (D) – lost
James B. Longley, Jr.
- 1994 – Maine’s 1st congressional district (R) – won
- 1996 – Maine’s 1st congressional district (R) – lost
Maximilian Longley
- 2004 – North Carolina’s 4th congressional district (W/I) – lost
Ken Longmyer
- 2004 – Virginia’s 11th congressional district (D) – lost
Dean J. Longo
- 2012 – Virginia’s 3rd congressional district (R) – lost
Louis Longo
- 1954 – New York’s 40th congressional district (Liberal) – lost
A. P. Longshore
- 1920 – Alabama’s 4th congressional district (R) – lost
William L. Longshore, Jr.
- 1956 – Alabama’s 9th congressional district (R) – lost
Richard Longstreth
- 2016 – Colorado’s 2nd congressional district (L) – lost
Nicholas Longworth III
- 1920 – Ohio’s 1st congressional district (R) – won
- 1922 – Ohio’s 1st congressional district (R) – won
- 1924 – Ohio’s 1st congressional district (R) – won
- 1926 – Ohio’s 1st congressional district (R) – won
- 1928 – Ohio’s 1st congressional district (R) – won
- 1930 – Ohio’s 1st congressional district (R) – won
Parke Longworth
- 1924 – United States Senate (Illinois) (I) – lost
Harold K. Lonsdale
- 1990 – United States Senate (Oregon) (D) – lost
Frederick Charles Loofbourow
- 1930 – Utah’s 2nd congressional district (R) – won
- 1932 – Utah’s 2nd congressional district (R) – lost
- 1934 – Utah’s 2nd congressional district (R) – lost
Bob Look
- 2018 – Wisconsin’s 7th congressional district (D-W/I) – lost
Laura Loomer
- 2020 – Florida’s 21st congressional district (R) – lost
David Loomis
- 2004 – Kansas’ 4th congressional district (L) – lost
Donald H. Loomis
- 1932 – Connecticut’s 1st congressional district (Comm.) – lost
L. P. Loomis
- 1920 – Texas’ 18th congressional district (R) – lost
Ronald H. Loomis
- 1936 – Connecticut’s at large congressional district (Comm.) – lost
Steve Loor
- 2018 – North Carolina’s 4th congressional district (R) – lost
Patrick J. Loori
- 1960 – New Jersey’s 14th congressional district (I) – lost
John W. Loosemore
- 1998 – Michigan’s 1st congressional district (L) – lost
- 2000 – Michigan’s 1st congressional district (L) – lost
- 2002 – Michigan’s 1st congressional district (L) – lost
- 2004 – Michigan’s 1st congressional district (L) – lost
Anthony J. Lopez-Cisneros
- 2002 – Illinois’ 4th congressional district (R) – lost
Delia Lopez
- 2008 – Oregon’s 3rd congressional district (R) – lost
- 2010 – Oregon’s 3rd congressional district (R) – lost
Frank Lopez Jr.
- 2022 – Texas’ 23rd congressional district (I) – lost
Helen M. Lopez
- 1948 – New York’s 41st congressional district (American Labor) – lost
- 1950 – New York’s 41st congressional district (American Labor) – lost
Jim Lopez
- 2008 – California’s 20th congressional district (R) – lost
Junio Lopez
- 1962 – New Mexico’s at large congressional district (R) – lost
Omar N. López
- 2008 – Illinois’ 4th congressional district (G) – lost
Selena Lopez
- 2016 – United States Senate (Arizona) (I-W/I) – lost
Robert G. LoPresti
- 1972 – Delaware’s at large congressional district (American) – lost
- 1976 – Delaware’s at large congressional district (American) – lost
Richard P. Lorber
- 1976 – United States Senate (Rhode Island) (D) – lost
Diane E. Lorbiecki
- 2012 – United States Senate (Wisconsin) (I-W/I) – lost
Charles Lorch
- 1920 – Illinois’ 10th congressional district (S) – lost
Mark Lorch
- 2018 – Illinois’ 4th congressional district (R) – lost
Balfour Bowen Thorn Lord
- 1960 – United States Senate (New Jersey) (D) – lost
Bert Lord
- 1934 – New York’s 34th congressional district (R) – won
- 1936 – New York’s 34th congressional district (R) – won
- 1938 – New York’s 34th congressional district (R) – won
Bob Lord
- 2008 – Arizona’s 3rd congressional district (D) – lost
C. A. Lord
- 1922 – Texas’ 2nd congressional district (R) – lost
Paul J. Lord
- 2004 – Washington’s 9th congressional district (R) – lost
Randall Lord
- 2012 – Louisiana’s 4th congressional district (L) – lost
- 2014 – Louisiana’s 4th congressional district (L) – lost
Ludwig Lore
- 1924 – New York’s 14th congressional district (Workers) – lost
Marvin E. Lore
- 1956 – Illinois’ 10th congressional district (D) – lost
Dean Loren
- 2000 – New York’s 15th congressional district (G) – lost
Michael L. Lorentz
- 2016 – Ohio’s 6th congressional district (D) – lost
Mindy Lorentz
- 1990 – California’s 19th congressional district (W/I) – lost
- 1992 – California’s 22nd congressional district (G) – lost
Lineaus Hooper Lorette
- 1982 – United States Senate (Texas) (Citizens) – lost
Robert Lorge
- 2006 – United States Senate (Wisconsin) (R) – lost
Emil Loriks
- 1938 – South Dakota’s 1st congressional district (D) – lost
