Gerald F. Clifford
- 1934 – Wisconsin’s 8th congressional district (D) – lost
Michael J. Clifford
- 1948 – Maryland’s 2nd congressional district (Prog.) – lost
W. B. Clifford
- 1980 – Alabama’s 6th congressional district (D) – lost
Gary Clift
- 2010 – California’s 10th congressional district (R) – lost
Rob Clift
- 2002 – Alaska’s at large congressional district (L) – lost
James A. Clifton
- 1922 – Indiana’s 6th congressional district (D) – lost
Joel C. Clifton
- 1960 – North Carolina’s 7th congressional district (R) – lost
John Clifton
- 2000 – United States Senate (New York) (L) – lost
- 2010 – United States Senate (New York) (Special) (L) – lost
Sandra L. Climaco
- 1982 – Illinois’ 21st congressional district (Good Government) – lost
Benjamin Lee Cline
- 2018 – Virginia’s 6th congressional district (R) – won
- 2020 – Virginia’s 6th congressional district (R) – won
- 2022 – Virginia’s 6th congressional district (R) – won
Michael Cline
- 2012 – Oregon’s 3rd congressional district (L) – lost
Natalie Cline
- 2020 – West Virginia’s 1st congressional district (D) – lost
Nellie Cline
- 1924 – Kansas’ 7th congressional district (D) – lost
Robert C. Cline
- 1964 – California’s 22nd congressional district (R) – lost
- 1966 – California’s 22nd congressional district (R) – lost
Curtis Clinesmith
- 2000 – Texas’ 13th congressional district (D) – lost
Burt H. Clingan
- 1938 – United States Senate (Arizona) (R) – lost
William Floyd Clinger, Jr.
- 1978 – Pennsylvania’s 23rd congressional district (R) – won
- 1980 – Pennsylvania’s 23rd congressional district (R) – won
- 1982 – Pennsylvania’s 23rd congressional district (R) – won
- 1984 – Pennsylvania’s 23rd congressional district (R) – won
- 1986 – Pennsylvania’s 23rd congressional district (R) – won
- 1988 – Pennsylvania’s 23rd congressional district (R) – won
- 1990 – Pennsylvania’s 23rd congressional district (R) – won
- 1992 – Pennsylvania’s 5th congressional district (R, D) – won
- 1994 – Pennsylvania’s 5th congressional district (R, D) – won
Hillary Diane Rodham Clinton
- 2000 – United States Senate (New York) (D, WF, Liberal) – won
- 2006 – United States Senate (New York) (D, IND, WF) – won
William Jefferson Clinton
- 1974 – Arkansas’ 3rd congressional district (D) – lost
Roy Clippinger
- 1946 – Illinois’ 24th congressional district (R) – won
Fred A. Clise
- 1922 – Washington’s 2nd congressional district (D) – lost
Ernest E. Clock
- 1934 – New Jersey’s 8th congressional district (Proh.) – lost
- 1936 – New Jersey’s 8th congressional district (Proh.) – lost
Nicholas Joseph Clooney
- 2004 – Kentucky’s 4th congressional district (D) – lost
Dean Close
- 1976 – California’s 18th congressional district (D) – lost
Elliot Springs Close
- 1996 – United States Senate (South Carolina) (D) – lost
Henry Close
- 1922 – Pennsylvania’s 5th congressional district (S) – lost
Doug Cloud
- 2004 – Washington’s 6th congressional district (R) – lost
- 2006 – Washington’s 6th congressional district (R) – lost
- 2008 – Washington’s 6th congressional district (R) – lost
- 2010 – Washington’s 6th congressional district (R) – lost
Michael E. Cloud
- 1998 – United States Senate (Nevada) (L) – lost
- 2002 – United States Senate (Massachusetts) (L) – lost
Michael Jonathan Cloud
- 2018 – Texas’ 27th congressional district (R) – won
- 2020 – Texas’ 27th congressional district (R) – won
- 2022 – Texas’ 27th congressional district (R) – won
Tal L. Cloud
- 1992 – California’s 19th congressional district (R) – lost
Jay Clough
- 2010 – Washington’s 4th congressional district (D) – lost
Carla Cloum
- 1992 – Alabama’s 6th congressional district (I) – lost
C. E. Clouse
- 1924 – Illinois’ at large congressional district (SL) – lost
Wynne F. Clouse
- 1920 – Tennessee’s 4th congressional district (R) – won
- 1922 – Tennessee’s 4th congressional district (R) – lost
Jeremy Cloward
- 2009 – California’s 10th congressional district (Special) (G) – lost
- 2010 – California’s 10th congressional district (G) – lost
Ernest Harold Cluett
- 1934 – United States Senate (New York) (R) – lost
- 1936 – New York’s 29th congressional district (R) – won
- 1938 – New York’s 29th congressional district (R) – won
- 1940 – New York’s 29th congressional district (R) – won
Michael Clune
- 1950 – New York’s 43rd congressional district (American Labor) – lost
Edward G. Cluney
- 1940 – New York’s 33rd congressional district (American Labor) – lost
John C. Cluney
- 1946 – Connecticut’s 5th congressional district (S, Taxpayers’ Good Government) – lost
Wager F. Clunis
- 1966 – Michigan’s 8th congressional district (D) – lost
Ruth Chickering Clusen
- 1982 – Wisconsin’s 8th congressional district (D) – lost
Steve Clute
- 1994 – California’s 44th congressional district (D) – lost
James Enos Clyburn
- 1992 – South Carolina’s 6th congressional district (D) – won
- 1994 – South Carolina’s 6th congressional district (D) – won
- 1996 – South Carolina’s 6th congressional district (D) – won
- 1998 – South Carolina’s 6th congressional district (D) – won
- 2000 – South Carolina’s 6th congressional district (D) – won
- 2002 – South Carolina’s 6th congressional district (D) – won
- 2004 – South Carolina’s 6th congressional district (D) – won
- 2006 – South Carolina’s 6th congressional district (D) – won
- 2008 – South Carolina’s 6th congressional district (D) – won
- 2010 – South Carolina’s 6th congressional district (D) – won
- 2012 – South Carolina’s 6th congressional district (D) – won
- 2014 – South Carolina’s 6th congressional district (D) – won
- 2016 – South Carolina’s 6th congressional district (D) – won
- 2018 – South Carolina’s 6th congressional district (D) – won
- 2020 – South Carolina’s 6th congressional district (D) – won
- 2022 – South Carolina’s 6th congressional district (D) – won
Andrew Scott Clyde
- 2020 – Georgia’s 9th congressional district (R) – won
- 2022 – Georgia’s 9th congressional district (R) – won
William Clyde
- 2014 – Connecticut’s 2nd congressional district (G) – lost
James N. Clymer
- 2004 – United States Senate (Pennsylvania) (C) – lost
Jeff Coad
- 1988 – Michigan’s 7th congressional district (R) – lost
Merwin Coad
- 1956 – Iowa’s 6th congressional district (D) – won
- 1958 – Iowa’s 6th congressional district (D) – won
- 1960 – Iowa’s 6th congressional district (D) – won
Charles P. Coady
- 1920 – Maryland’s 3rd congressional district (D) – lost
Vince Coakley
- 2013 – North Carolina’s 12th congressional district (Special) (R) – lost
- 2014 – North Carolina’s 12th congressional district (R) – lost
