Ida G. Kast
- 1934 – Pennsylvania’s 19th congressional district (Proh.) – lost
Robert Walter Kasten, Jr.
- 1974 – Wisconsin’s 9th congressional district (R) – won
- 1976 – Wisconsin’s 9th congressional district (R) – won
- 1980 – United States Senate (Wisconsin) (R) – won
- 1986 – United States Senate (Wisconsin) (R) – won
- 1992 – United States Senate (Wisconsin) (R) – lost
Diana K. Kastenbaum
- 2016 – New York’s 27th congressional district (D) – lost
Robert William Kastenmeier
- 1956 – Wisconsin’s 2nd congressional district (D) – lost
- 1958 – Wisconsin’s 2nd congressional district (D) – won
- 1960 – Wisconsin’s 2nd congressional district (D) – won
- 1962 – Wisconsin’s 2nd congressional district (D) – won
- 1964 – Wisconsin’s 2nd congressional district (D) – won
- 1966 – Wisconsin’s 2nd congressional district (D) – won
- 1968 – Wisconsin’s 2nd congressional district (D) – won
- 1970 – Wisconsin’s 2nd congressional district (D) – won
- 1972 – Wisconsin’s 2nd congressional district (D) – won
- 1974 – Wisconsin’s 2nd congressional district (D) – won
- 1976 – Wisconsin’s 2nd congressional district (D) – won
- 1978 – Wisconsin’s 2nd congressional district (D) – won
- 1980 – Wisconsin’s 2nd congressional district (D) – won
- 1982 – Wisconsin’s 2nd congressional district (D) – won
- 1984 – Wisconsin’s 2nd congressional district (D) – won
- 1986 – Wisconsin’s 2nd congressional district (D) – won
- 1988 – Wisconsin’s 2nd congressional district (D) – won
- 1990 – Wisconsin’s 2nd congressional district (D) – lost
John D. Kaster
- 1960 – California’s 9th congressional district (D) – lost
John Kasun
- 1928 – United States Senate (Wisconsin) (Workers) – lost
- 1930 – Wisconsin’s 4th congressional district (Ind. Comm.) – lost
Rosemary D. Kaszans
- 1996 – Georgia’s 1st congressional district (D) – lost
David Katan, Sr.
- 1982 – New York’s 12th congressional district (R) – lost
Andrew G. Katcher
- 1948 – Pennsylvania’s 25th congressional district (D) – lost
John Michael Katko
- 2014 – New York’s 24th congressional district (R, CON, IND) – won
- 2016 – New York’s 24th congressional district (R, CON, IND, Ref.) – won
- 2018 – New York’s 24th congressional district (R, CON, IND, Ref.) – won
- 2020 – New York’s 24th congressional district (R, CON, IND) – won
Norman C. Katner
- 1962 – New York’s 37th congressional district (D, Liberal) – lost
Marina Kats
- 2008 – Pennsylvania’s 13th congressional district (R) – lost
Kerry J. Katsorhis
- 1996 – New York’s 18th congressional district (R, CON) – lost
Franklin E. Katterjohn
- 1958 – Indiana’s 8th congressional district (R) – lost
John M. Katterjohn
- 1972 – Kentucky’s 1st congressional district (Less Federal Taxes) – lost
Blanche Katx
- 1950 – New York’s 11th congressional district (American Labor) – lost
Adam D. Katz
- 2000 – Colorado’s 6th congressional district (L) – lost
- 2002 – Colorado’s 6th congressional district (L) – lost
Blanche K. Katz
- 1954 – New York’s 14th congressional district (American Labor) – lost
Howard Katz
- 2010 – California’s 49th congressional district (D) – lost
Howard S. Katz
- 1982 – United States Senate (Massachusetts) (L) – lost
Ilya Katz
- 2012 – Florida’s 23rd congressional district (NP) – lost
J. Lawrence Katz
- 1968 – New York’s 29th congressional district (Liberal) – lost
Lewis R. Katz
- 2006 – Ohio’s 14th congressional district (D) – lost
Melinda Katz
- 1998 – New York’s 9th congressional district (Liberal) – lost
Myron Katz
- 2010 – Louisiana’s 1st congressional district (D) – lost
Ruth Katz
- 1996 – New Jersey’s 2nd congressional district (D) – lost
Bernard Katzen
- 1926 – New York’s 18th congressional district (R) – lost
- 1928 – New York’s 18th congressional district (R) – lost
Jay Kenneth Katzen
- 2002 – Virginia’s 9th congressional district (W/I) – lost
Kenneth Katzman
- 1984 – New York’s 17th congressional district (R) – lost
I. Katzowitz
- 1936 – New York’s 27th congressional district (Comm.) – lost
D. Richard Kau
- 1972 – California’s 41st congressional district (R) – lost
Steven L. Kauer
- 1992 – Idaho’s 2nd congressional district (I) – lost
Jeremy Kauffman
- 2022 – United States Senate (New Hampshire) (L) – lost
Lawrence R. Kauffman
- 1982 – United States Senate (Utah) (American) – lost
Luther S. Kauffman
- 1920 – Pennsylvania’s at large congressional district (Proh.) – lost
Raymond S. Kauffman
- 1978 – Pennsylvania’s 3rd congressional district (R) – lost
William C. Kauffman
- 1932 – New Jersey’s 4th congressional district (S) – lost
- 1934 – New Jersey’s 4th congressional district (S) – lost
- 1936 – New Jersey’s 4th congressional district (FL) – lost
- 1938 – New Jersey’s 4th congressional district (S) – lost
- 1940 – New Jersey’s 4th congressional district (S) – lost
- 1942 – New Jersey’s 4th congressional district (S) – lost
- 1944 – New Jersey’s 4th congressional district (S) – lost
C. Bernard Kaufman
- 1964 – California’s 20th congressional district (D) – lost
Joseph Kaufman
- 2014 – Florida’s 23rd congressional district (R) – lost
- 2016 – Florida’s 23rd congressional district (R) – lost
- 2018 – Florida’s 23rd congressional district (R) – lost
Nancy Kaufman
- 1976 – United States Senate (Vermont) (LU) – lost
Arthur A. Kaul
- 1958 – Washington’s 3rd congressional district (C) – lost
Frank Kaul
- 1992 – Kansas’ 3rd congressional district (L) – lost
Ralph Kaul
- 1960 – Virginia’s 10th congressional district (D) – lost
H. Kaumeier
- 1922 – Michigan’s 7th congressional district (S) – lost
Gary Kauther
- 2010 – Wisconsin’s 7th congressional district (I) (No War No Bailout) – lost
Thomas A. Kavanagh
- 1920 – Pennsylvania’s at large congressional district (Single Tax) – lost
Harry Kavesh
- 1952 – New York’s 23rd congressional district (Liberal) – lost
Michael N. Kavouklis
- 1984 – Florida’s 7th congressional district (R) – lost
Morris Kay
- 1982 – Kansas’ 2nd congressional district (R) – lost
Richard B. Kay
- 1970 – United States Senate (Ohio) (AI) – lost
- 1972 – Ohio’s 20th congressional district (AI) – lost
- 1974 – United States Senate (Ohio) (I) – lost
