Dave Koller
- 2014 – Florida’s 11th congressional district (D) – lost
- 2016 – Florida’s 11th congressional district (D) – lost
Marc Koller
- 2018 – Oregon’s 3rd congressional district (I) – lost
Richard T. Koller
- 2010 – United States Senate (Alaska) (W/I) – lost
Steven Kolln
- 2020 – New York’s 12th congressional district (L) – lost
Mike Kolls
- 2014 – Texas’ 24th congressional district (L) – lost
- 2016 – Texas’ 24th congressional district (L) – lost
- 2018 – Texas’ 24th congressional district (L) – lost
- 2022 – Texas’ 26th congressional district (L) – lost
Cyrill Kolocotronis
- 1994 – United States Senate (Missouri) (I) – lost
Philip Kolodny
- 2018 – Michigan’s 14th congressional district (Working Class) – lost
- 2020 – Michigan’s 14th congressional district (Working Class) – lost
Gloria J. Kolodziej
- 1992 – New Jersey’s 8th congressional district (Independent for Change) – lost
Todd Kolosso
- 2010 – Wisconsin’s 5th congressional district (D) – lost
Leonard R. Kolpacke
- 1938 – Michigan’s 16th congressional district (Const. Dem.) – lost
Allen C. Kolstad
- 1990 – United States Senate (Montana) (R) – lost
Andrew Kolstee
- 2020 – New York’s 23rd congressional district (L) – lost
Joseph Paul Kolter
- 1982 – Pennsylvania’s 4th congressional district (D) – won
- 1984 – Pennsylvania’s 4th congressional district (D) – won
- 1986 – Pennsylvania’s 4th congressional district (D) – won
- 1988 – Pennsylvania’s 4th congressional district (D) – won
- 1990 – Pennsylvania’s 4th congressional district (D) – won
Peter Koltypin
- 1974 – Connecticut’s 3rd congressional district (George Wallace) – lost
Charles J. Komaiko
- 1950 – Illinois’ 12th congressional district (D) – lost
Kenneth Kondner
- 1990 – Maryland’s 7th congressional district (R) – lost
- 1992 – Maryland’s 7th congressional district (R) – lost
- 1994 – Maryland’s 7th congressional district (R) – lost
- 1996 – Maryland’s 7th congressional district (R) – lost
- 1998 – Maryland’s 7th congressional district (R) – lost
- 2000 – Maryland’s 7th congressional district (R) – lost
Susan L. Kone
- 2010 – New York’s 8th congressional district (R, CON) – lost
Barrie Leslie Konicov
- 1994 – Michigan’s 3rd congressional district (L) – lost
Antoinette F. Konikow
- 1924 – United States Senate (Massachusetts) (Workers) – lost
Gary L. Koniz
- 2010 – Florida’s 4th congressional district (W/I) – lost
- 2012 – Florida’s 4th congressional district (W/I) – lost
- 2014 – Florida’s 4th congressional district (I) – lost
- 2016 – Florida’s 4th congressional district (NPA) – lost
- 2018 – Florida’s 4th congressional district (I-W/I) – lost
- 2020 – Florida’s 4th congressional district (W/I) – lost
- 2022 – Florida’s 4th congressional district (I-W/I) – lost
Ernest Leslie Konnyu
- 1976 – California’s 13th congressional district (R) – lost
- 1986 – California’s 12th congressional district (R) – won
Ben Konop
- 2004 – Ohio’s 4th congressional district (D) – lost
John R. Konopka
- 1998 – California’s 36th congressional district (Ref.) – lost
- 2000 – California’s 36th congressional district (Ref.) – lost
Richard Konrad
- 1992 – Texas’ 22nd congressional district (D) – lost
Walter E. Konstanty
- 1990 – New Jersey’s 1st congressional district (Pride and Honesty) – lost
George F. Koob
- 1936 – Iowa’s 2nd congressional district (Union) – lost
Carol S. Kooistra
- 1992 – Michigan’s 3rd congressional district (D) – lost
Theodore Koons
- 1920 – Pennsylvania’s 8th congressional district (Proh.) – lost
Steven K. Koonse
- 2020 – 4th congressional district (L) – lost
Michael W. Koontz
- 1998 – New Jersey’s 9th congressional district (I) – lost
Roberta F. Koontz
- 1984 – Connecticut’s 2nd congressional district (R) – lost
George Koop
- 1924 – United States Senate (Illinois) (S) – lost
- 1926 – Illinois’ at large congressional district (S) – lost
- 1930 – United States Senate (Illinois) (S) – lost
- 1932 – Illinois’ at large congressional district (S) – lost
Joseph Kooperman
- 1952 – New York’s 29th congressional district (American Labor) – lost
Fred Koory, Jr.
- 1976 – Arizona’s 3rd congressional district (R) – lost
Noel Kopala
- 1990 – Texas’ 3rd congressional district (W/I) – lost
- 1992 – Texas’ 3rd congressional district (L) – lost
- 1994 – Texas’ 5th congressional district (L) – lost
Thomas G. Kopel
- 2000 – Pennsylvania’s 6th congressional district (R) – lost
Michael Joseph Kopetski
- 1988 – Oregon’s 5th congressional district (D) – lost
- 1990 – Oregon’s 5th congressional district (D) – won
- 1992 – Oregon’s 5th congressional district (D) – won
Gerald W. Kopp
- 1986 – North Dakota’s at large congressional district (I) – lost
Harry F. Kopp
- 1934 – New Jersey’s 6th congressional district (S) – lost
William Frederick Kopp
- 1920 – Iowa’s 1st congressional district (R) – won
- 1922 – Iowa’s 1st congressional district (R) – won
- 1924 – Iowa’s 1st congressional district (R) – won
- 1926 – Iowa’s 1st congressional district (R) – won
- 1928 – Iowa’s 1st congressional district (R) – won
- 1930 – Iowa’s 1st congressional district (R) – won
- 1932 – Iowa’s 1st congressional district (R) – lost
Edwin Koppel
- 1936 – New York’s 12th congressional district (S) – lost
Martin Koppel
- 2004 – United States Senate (New York) (SW) – lost
- 2008 – New York’s 15th congressional district (SW) – lost
William W. Koppel
- 1990 – New York’s 17th congressional district (R) – lost
Walter H. Koppelman
- 1970 – California’s 36th congressional district (PF) – lost
Chad N. Koppie
- 1992 – United States Senate (Illinois) (CON) – lost
- 1996 – United States Senate (Illinois) (T) – lost
- 2008 – United States Senate (Illinois) (C) – lost
- 2016 – United States Senate (Illinois) (W/I) – lost
Georgenia J. Koppke
- 1932 – Wisconsin’s 2nd congressional district (Proh.) – lost
Herman Paul Kopplemann
- 1928 – Connecticut’s 1st congressional district (D) – lost
- 1932 – Connecticut’s 1st congressional district (D) – won
- 1934 – Connecticut’s 1st congressional district (D, Independent Citizens) – won
- 1936 – Connecticut’s 1st congressional district (D) – won
- 1938 – Connecticut’s 1st congressional district (D) – lost
- 1940 – Connecticut’s 1st congressional district (D) – won
- 1942 – Connecticut’s 1st congressional district (D) – lost
- 1944 – Connecticut’s 1st congressional district (D) – won
- 1946 – Connecticut’s 1st congressional district (D) – lost
Joseph Kopser
- 2018 – Texas’ 21st congressional district (D) – lost
Joseph William Kopsick
- 2012 – Wisconsin’s 2nd congressional district (I-W/I) – lost
- 2016 – Illinois’ 10th congressional district (W/I) – lost
Franklin Frederick Korell
- 1928 – Oregon’s 3rd congressional district (R) – won
- 1930 – Oregon’s 3rd congressional district (R) – lost
