John W. Cooper, Jr.
- 1972 – Missouri’s 2nd congressional district (R) – lost
Kelly Cooper
- 2022 – Arizona’s 4th congressional district (R) – lost
Kenneth D. Cooper
- 1996 – Florida’s 22nd congressional district (D) – lost
L. Jere Cooper
- 1932 – Tennessee’s 8th congressional district (D) – won
Randal Cooper
- 2022 – Tennessee’s 6th congressional district (D) – lost
Samuel Cooper
- 1958 – New Jersey’s 13th congressional district (I) – lost
Virgil R. Cooper
- 1994 – Oklahoma’s 2nd congressional district (D) – lost
William F. Cooper
- 1952 – Illinois’ 8th congressional district (R) – lost
Jeff Coopersmith
- 1996 – Washington’s 1st congressional district (D) – lost
Joe Coors
- 2012 – Colorado’s 7th congressional district (R) – lost
Peter Hanson Coors
- 2004 – United States Senate (Colorado) (R) – lost
Charles S. Cooter
- 1932 – Iowa’s 6th congressional district (D) – lost
Morris Coover
- 1972 – Kansas’ 1st congressional district (D) – lost
Percy K. Coover
- 1932 – Pennsylvania’s 22nd congressional district (S) – lost
Clay Cope
- 2016 – Connecticut’s 5th congressional district (R, I) – lost
Lloyd G. Cope
- 1968 – Pennsylvania’s 16th congressional district (C) – lost
- 1970 – Pennsylvania’s 12th congressional district (C) – lost
- 1970 – Pennsylvania’s 21st congressional district (C) – lost
A. J. Copeland
- 1920 – New York’s 8th congressional district (Proh.) – lost
Gary D. Copeland
- 1992 – California’s 45th congressional district (L) – lost
L. D. Copeland
- 1926 – Tennessee’s 3rd congressional district (R) – lost
Maurice Copeland
- 2018 – Missouri’s 5th congressional district (G) – lost
Oren Sturman Copeland
- 1940 – Nebraska’s 1st congressional district (R) – won
Robert W. Copeland
- 1970 – California’s 17th congressional district (AI) – lost
Royal Samuel Copeland
- 1922 – United States Senate (New York) (D) – won
- 1928 – United States Senate (New York) (D) – won
- 1934 – United States Senate (New York) (D) – won
Ron Copier
- 2002 – Utah’s 2nd congressional district (L) – lost
Benjamin Copley
- 1956 – New York’s 35th congressional district (American Labor) – lost
Ira Clifton Copley
- 1920 – Illinois’ 11th congressional district (R) – won
Belton A. Copp
- 1964 – Connecticut’s 2nd congressional district (R) – lost
Samuel G. Coppersmith
- 1992 – Arizona’s 1st congressional district (D) – won
- 1994 – United States Senate (Arizona) (D) – lost
Bert Copple
- 2008 – Michigan’s 12th congressional district (R) – lost
John Coppola
- 1996 – Connecticut’s 3rd congressional district (R) – lost
Bobbie Coray
- 1994 – Utah’s 1st congressional district (D) – lost
Carla W. Coray
- 1974 – Hawaii’s 2nd congressional district (R) – lost
Alfred Hoyt Corbett
- 1952 – Oregon’s 3rd congressional district (D) – lost
Donald J. Corbett
- 1936 – New York’s 39th congressional district (D) – lost
Frank E. Corbett
- 1940 – Indiana’s 4th congressional district (D) – lost
James Corbett
- 1922 – New York’s 32nd congressional district (FL, Proh.) – lost
Paul D. Corbett
- 1968 – Pennsylvania’s 4th congressional district (C) – lost
Robert James Corbett
- 1938 – Pennsylvania’s 30th congressional district (R) – won
- 1940 – Pennsylvania’s 30th congressional district (R) – lost
- 1944 – Pennsylvania’s 30th congressional district (R) – won
- 1946 – Pennsylvania’s 30th congressional district (R) – won
- 1948 – Pennsylvania’s 30th congressional district (R) – won
- 1950 – Pennsylvania’s 30th congressional district (R) – won
- 1952 – Pennsylvania’s 29th congressional district (R) – won
- 1954 – Pennsylvania’s 29th congressional district (R) – won
- 1956 – Pennsylvania’s 29th congressional district (R) – won
- 1958 – Pennsylvania’s 29th congressional district (R) – won
- 1960 – Pennsylvania’s 29th congressional district (R) – won
- 1962 – Pennsylvania’s 18th congressional district (R) – won
- 1964 – Pennsylvania’s 18th congressional district (R) – won
- 1966 – Pennsylvania’s 18th congressional district (R) – won
- 1968 – Pennsylvania’s 18th congressional district (R) – won
- 1970 – Pennsylvania’s 18th congressional district (R) – won
Orville F. Corbin
- 1954 – Illinois’ 6th congressional district (R) – lost
Dan Corcoran
- 1978 – California’s 37th congressional district (D) – lost
John Hubert Corcoran, Jr.
- 1944 – United States Senate (Massachusetts) (Special) (D) – lost
Joyce Jansa Corcoran
- 2002 – United States Senate (Wyoming) (D) – lost
Lawrence E. Corcoran
- 1956 – Massachusetts’ 5th congressional district (D) – lost
Thomas Joseph Corcoran
- 1976 – Illinois’ 15th congressional district (R) – won
- 1978 – Illinois’ 15th congressional district (R) – won
- 1980 – Illinois’ 15th congressional district (R) – won
- 1982 – Illinois’ 14th congressional district (R) – won
Robert C. Cordaro
- 1988 – Pennsylvania’s 10th congressional district (D) – lost
Paul Corden
- 2008 – South Carolina’s 4th congressional district (D) – lost
- 2010 – South Carolina’s 4th congressional district (D) – lost
John F. Corder
- 1928 – Kansas’ 5th congressional district (D) – lost
Loidis R. Cordero
- 1980 – New York’s 21st congressional district (RTL) – lost
- 1982 – New York’s 18th congressional district (Popular) – lost
Joyce Cordi
- 2008 – California’s 15th congressional district (R) – lost
Guy F. Cordon
- 1944 – United States Senate (Oregon) (Special) (R) – won
- 1948 – United States Senate (Oregon) (R) – won
- 1954 – United States Senate (Oregon) (R) – lost
