Billie M. Cox
- 1970 – Illinois’ 20th congressional district (D) – lost
Boyd W. Cox
- 1952 – Tennessee’s 2nd congressional district (D) – lost
Carolyn Cox
- 2000 – Colorado’s 2nd congressional district (R) – lost
Charles Christopher Cox
- 1988 – California’s 40th congressional district (R) – won
- 1990 – California’s 40th congressional district (R) – won
- 1992 – California’s 47th congressional district (R) – won
- 1994 – California’s 47th congressional district (R) – won
- 1996 – California’s 47th congressional district (R) – won
- 1998 – California’s 47th congressional district (R) – won
- 2000 – California’s 47th congressional district (R) – won
- 2002 – California’s 48th congressional district (R) – won
- 2004 – California’s 48th congressional district (R) – won
Charles L. Cox
- 1928 – Michigan’s 6th congressional district (Workers) – lost
Clay Cox
- 2002 – Georgia’s 13th congressional district (R) – lost
Cox (Alabama)
- 1920 – Alabama’s 9th congressional district (S) – lost
Cox (Missouri)
- 1922 – Missouri’s 7th congressional district (S) – lost
Dan Cox (Maryland)
- 2016 – Maryland’s 8th congressional district (R) – lost
Dan Cox (Montana)
- 2012 – United States Senate (Montana) (L) – lost
David Cox
- 2014 – Florida’s 6th congressional district (D) – lost
David R. Cox
- 1948 – United States Senate (Kentucky) (SL) – lost
Delson Cox, Jr.
- 1974 – Indiana’s 9th congressional district (R) – lost
Edward Eugene Cox
- 1924 – Georgia’s 2nd congressional district (D) – won
- 1926 – Georgia’s 2nd congressional district (D) – won
- 1928 – Georgia’s 2nd congressional district (D) – won
- 1930 – Georgia’s 2nd congressional district (D) – won
- 1932 – Georgia’s 2nd congressional district (D) – won
- 1934 – Georgia’s 2nd congressional district (D) – won
- 1936 – Georgia’s 2nd congressional district (D) – won
- 1938 – Georgia’s 2nd congressional district (D) – won
- 1940 – Georgia’s 2nd congressional district (D) – won
- 1942 – Georgia’s 2nd congressional district (D) – won
- 1944 – Georgia’s 2nd congressional district (D) – won
- 1946 – Georgia’s 2nd congressional district (D) – won
- 1948 – Georgia’s 2nd congressional district (D) – won
- 1950 – Georgia’s 2nd congressional district (D) – won
- 1952 – Georgia’s 2nd congressional district (D) – won
Gary C.L. Cox
- 2010 – United States Senate (Alaska) (W/I) – lost
Harvey A. Cox, Jr.
- 1948 – North Carolina’s 5th congressional district (Prog.) – lost
Henry John Cox
- 1920 – New Jersey’s 6th congressional district (Proh.) – lost
- 1926 – New Jersey’s 6th congressional district (S) – lost
- 1928 – New Jersey’s 6th congressional district (S) – lost
- 1930 – New Jersey’s 6th congressional district (S) – lost
- 1932 – New Jersey’s 9th congressional district (S) – lost
- 1934 – New Jersey’s 9th congressional district (S) – lost
- 1936 – New Jersey’s 9th congressional district (S) – lost
J. Ray Cox
- 1974 – Idaho’s 1st congressional district (D) – lost
James Otis Cox
- 1940 – Indiana’s 2nd congressional district (D) – lost
- 1944 – Indiana’s 2nd congressional district (D) – lost
John Cox
- 1996 – Arizona’s 1st congressional district (D) – lost
John W. Cox, Jr.
- 1990 – Illinois’ 16th congressional district (D) – won
- 1992 – Illinois’ 16th congressional district (D) – lost
Julius W. Cox
- 1942 – Oklahoma’s 8th congressional district (D) – lost
Noel Cox
- 1958 – Missouri’s 7th congressional district (R) – lost
Patti Cox
- 2006 – Louisiana’s 4th congressional district (D) – lost
Paul W. Cox
- 1956 – Indiana’s 11th congressional district (Proh.) – lost
Pliny Cox
- 1944 – Indiana’s 6th congressional district (Proh.) – lost
Rosslyn M. Cox
- 1920 – New York’s 26th congressional district (D) – lost
- 1924 – New York’s 26th congressional district (D) – lost
- 1932 – New York’s 26th congressional district (D) – lost
Stanley R. Cox, Jr.
- 1964 – West Virginia’s 2nd congressional district (R) – lost
Steve Cox
- 2008 – Illinois’ 15th congressional district (D) – lost
Terrance John Cox
- 2006 – California’s 19th congressional district (D) – lost
- 2018 – California’s 21st congressional district (D) – won
- 2020 – California’s 21st congressional district (D) – lost
William H. Cox
- 1920 – Missouri’s 7th congressional district (R) – lost
William W. Cox
- 1922 – United States Senate (Missouri) (SL) – lost
- 1926 – United States Senate (Missouri) (SL) – lost
- 1928 – United States Senate (Missouri) (SL) – lost
- 1934 – United States Senate (Missouri) (SL) – lost
- 1944 – United States Senate (Missouri) (SL) – lost
Gertrude M. Coxe
- 1990 – Rhode Island’s 2nd congressional district (R) – lost
Jacob Sechler Coxey, Sr.
- 1922 – Ohio’s 18th congressional district (I) – lost
- 1924 – Ohio’s 16th congressional district (I) – lost
- 1928 – Ohio’s 18th congressional district (S) – lost
- 1936 – Ohio’s 16th congressional district (Union) – lost
Jacob Coxey
- 1928 – Ohio’s 16th congressional district (I) – lost
Arnold B. Coxhill
- 1942 – Michigan’s 9th congressional district (D) – lost
- 1944 – Michigan’s 9th congressional district (D) – lost
Alfred F. Coyle
- 1924 – Ohio’s 22nd congressional district (I) – lost
Billy Coyle
- 2010 – Oklahoma’s 5th congressional district (D) – lost
Brian John Coyle
- 1978 – United States Senate (Minnesota) (Public Interest Independent) – lost
Francis I. J. Coyle
- 1924 – Pennsylvania’s 6th congressional district (D, Labor) – lost
T. Burton Coyle
- 1938 – New Jersey’s 13th congressional district (R) – lost
William Radford Coyle
- 1924 – Pennsylvania’s 30th congressional district (R) – won
- 1926 – Pennsylvania’s 30th congressional district (R) – lost
- 1928 – Pennsylvania’s 30th congressional district (R) – won
- 1930 – Pennsylvania’s 30th congressional district (R) – won
- 1932 – Pennsylvania’s 21st congressional district (R) – lost
- 1936 – Pennsylvania’s 21st congressional district (R) – lost
- 1942 – Pennsylvania’s 21st congressional district (R) – lost
James Kitchenman Coyne III
- 1980 – Pennsylvania’s 8th congressional district (R) – won
- 1982 – Pennsylvania’s 8th congressional district (R) – lost
Thomas J. Coyne, Jr.
- 1996 – Ohio’s 19th congressional district (D) – lost
William Joseph Coyne
- 1980 – Pennsylvania’s 14th congressional district (D) – won
- 1982 – Pennsylvania’s 14th congressional district (D) – won
- 1984 – Pennsylvania’s 14th congressional district (D) – won
- 1986 – Pennsylvania’s 14th congressional district (D) – won
- 1988 – Pennsylvania’s 14th congressional district (D) – won
- 1990 – Pennsylvania’s 14th congressional district (D) – won
- 1992 – Pennsylvania’s 14th congressional district (D) – won
- 1994 – Pennsylvania’s 14th congressional district (D) – won
- 1996 – Pennsylvania’s 14th congressional district (D) – won
- 1998 – Pennsylvania’s 14th congressional district (D) – won
- 2000 – Pennsylvania’s 14th congressional district (D) – won
David E. Cozad
- 2014 – Texas’ 6th congressional district (D) – lost
- 2010 – Texas’ 6th congressional district (D) – lost
Harry Cozad
- 1984 – California’s 2nd congressional district (D) – lost
Chuck Cozzens
- 1984 – United States Senate (Montana) (R) – lost
Robert A. Cozzi, Jr.
- 1998 – Illinois’ 14th congressional district (D) – lost
Artemio Cozzini
- 1950 – United States Senate (Wisconsin) (I) – lost
