William Homer Thornberry
- 1948 – Texas’ 10th congressional district (D) – won
- 1950 – Texas’ 10th congressional district (D) – won
- 1952 – Texas’ 10th congressional district (D) – won
- 1954 – Texas’ 10th congressional district (D) – won
- 1956 – Texas’ 10th congressional district (D) – won
- 1958 – Texas’ 10th congressional district (D) – won
- 1960 – Texas’ 10th congressional district (D) – won
- 1962 – Texas’ 10th congressional district (D) – won
William McClellan Thornberry
- 1994 – Texas’ 13th congressional district (R) – won
- 1996 – Texas’ 13th congressional district (R) – won
- 1998 – Texas’ 13th congressional district (R) – won
- 2000 – Texas’ 13th congressional district (R) – won
- 2002 – Texas’ 13th congressional district (R) – won
- 2004 – Texas’ 13th congressional district (R) – won
- 2006 – Texas’ 13th congressional district (R) – won
- 2008 – Texas’ 13th congressional district (R) – won
- 2010 – Texas’ 13th congressional district (R) – won
- 2012 – Texas’ 13th congressional district (R) – won
- 2014 – Texas’ 13th congressional district (R) – won
- 2016 – Texas’ 13th congressional district (R) – won
- 2018 – Texas’ 13th congressional district (R) – won
Richard L. Thornburgh
- 1966 – Pennsylvania’s 14th congressional district (R) – lost
Guy Thorne
- 1930 – Pennsylvania’s 28th congressional district (D) – lost
Robert T. Thorne
- 2014 – New Jersey’s 8th congressional district (911 Truth Needed) – lost
Benjamin Thornley
- 1960 – New York’s 23rd congressional district (R) – lost
Albert H. Thornton
- 1968 – Pennsylvania’s 25th congressional district (C) – lost
- 1970 – Pennsylvania’s 25th congressional district (C) – lost
Daniel Isaac J. Thornton
- 1956 – United States Senate (Colorado) (R) – lost
Dee Thornton
- 2018 – Indiana’s 5th congressional district (D) – lost
Josh Thornton
- 2017 – South Carolina’s 5th congressional district (Special) (American) – lost
Mark Thornton
- 1984 – Alabama’s 3rd congressional district (L) – lost
- 1996 – United States Senate (Alabama) (L) – lost
Raymond Hoyt Thornton, Jr.
- 1972 – Arkansas’ 4th congressional district (D) – won
- 1974 – Arkansas’ 4th congressional district (D) – won
- 1976 – Arkansas’ 4th congressional district (D) – won
- 1990 – Arkansas’ 2nd congressional district (D) – won
- 1992 – Arkansas’ 2nd congressional district (D) – won
- 1994 – Arkansas’ 2nd congressional district (D) – won
Richard F. Thornton
- 1986 – Pennsylvania’s 19th congressional district (D) – lost
Robert Y. Thornton
- 1958 – Oregon’s 1st congressional district (D) – lost
Vince Thornton
- 1994 – Mississippi’s 2nd congressional district (T) – lost
- 1998 – Mississippi’s 4th congressional district (T) – lost
William J. Thornton
- 1930 – Illinois’ 20th congressional district (R) – lost
- 1932 – Illinois’ 20th congressional district (R) – lost
John S. Thorp
- 1944 – New York’s 2nd congressional district (D, American Labor) – lost
W. C. Thorp
- 1934 – United States Senate (New Mexico) (S) – lost
Devin Thorpe
- 2020 – Utah’s 3rd congressional district (D) – lost
Elving Thorpe
- 1960 – Michigan’s 11th congressional district (Proh.) – lost
Marion Dennis Thorpe Jr.
- 2008 – Florida’s 23rd congressional district (R) – lost
Roy H. Thorpe
- 1922 – Nebraska’s 1st congressional district (Special) (R) – won
- 1924 – Nebraska’s 1st congressional district (R) – lost
Eric Thorsland
- 2014 – Illinois’ 15th congressional district (D) – lost
Leo Keith Thorsness
- 1974 – United States Senate (South Dakota) (R) – lost
- 1978 – South Dakota’s 1st congressional district (R) – lost
Thomas L. Thorson
- 1976 – Indiana’s 3rd congressional district (R) – lost
- 1978 – Indiana’s 3rd congressional district (R) – lost
David Thorstad
- 1968 – Minnesota’s 5th congressional district (SW) – lost
William Clay Thrash
- 2000 – Mississippi’s 3rd congressional district (D) – lost
John Thrasher
- 2006 – Arizona’s 2nd congressional district (D) – lost
- 2008 – Arizona’s 2nd congressional district (D) – lost
- 2010 – Arizona’s 2nd congressional district (D) – lost
Wilkes Thrasher, Jr.
- 1962 – Tennessee’s 3rd congressional district (D) – lost
Leon Threatt
- 2016 – North Carolina’s 12th congressional district (R) – lost
Anna E. Throne-Holst
- 2016 – New York’s 1st congressional district (D, WF, Women’s Equality) – lost
Joshua Throneburg
- 2022 – Virginia’s 5th congressional district (D) – lost
W. C. Throp
- 1936 – United States Senate (New Mexico) (Special) (FL) – lost
Randolph W. Thrower
- 1956 – Georgia’s 5th congressional district (R) – lost
John Randolph Thune
- 1996 – South Dakota’s at large congressional district (R) – won
- 1998 – South Dakota’s at large congressional district (R) – won
- 2000 – South Dakota’s at large congressional district (R) – won
- 2002 – United States Senate (South Dakota) (R) – lost
- 2004 – United States Senate (South Dakota) (R) – won
- 2010 – United States Senate (South Dakota) (R) – won
- 2016 – United States Senate (South Dakota) (R) – won
- 2022 – United States Senate (South Dakota) (R) – won
James P. Thurber, Jr.
- 1962 – California’s 10th congressional district (D) – lost
Kenneth W. Thurlow
- 1940 – United States Senate (Connecticut) (S) – lost
Karen L. Thurman
- 1992 – Florida’s 5th congressional district (D) – won
- 1994 – Florida’s 5th congressional district (D) – lost
- 1996 – Florida’s 5th congressional district (D) – won
- 1998 – Florida’s 5th congressional district (D) – won
- 2000 – Florida’s 5th congressional district (D) – won
- 2002 – Florida’s 5th congressional district (D) – lost
James Strom Thurmond
- 1954 – United States Senate (South Carolina) (D-W/I) – won
- 1956 – United States Senate (South Carolina) (Special) (D) – won
- 1960 – United States Senate (South Carolina) (D) – won
- 1966 – United States Senate (South Carolina) (R) – won
- 1972 – United States Senate (South Carolina) (R) – won
- 1978 – United States Senate (South Carolina) (R) – won
- 1984 – United States Senate (South Carolina) (R) – won
- 1990 – United States Senate (South Carolina) (R) – won
- 1996 – United States Senate (South Carolina) (R) – won
Michael L. Thurmond
- 2010 – United States Senate (Georgia) (D) – lost
R. L. Thurmond
- 1924 – Oklahoma’s 3rd congressional district (FL) – lost
Charles Thurston
- 1998 – Iowa’s 1st congressional district (Ref.) – lost
Lloyd Thurston
- 1924 – Iowa’s 8th congressional district (R) – won
- 1926 – Iowa’s 8th congressional district (R) – won
- 1928 – Iowa’s 8th congressional district (R) – won
- 1930 – Iowa’s 8th congressional district (R) – won
- 1932 – Iowa’s 5th congressional district (R) – won
- 1934 – Iowa’s 5th congressional district (R) – won
- 1936 – Iowa’s 5th congressional district (R) – won
Edward John Thye
- 1946 – United States Senate (Minnesota) (R) – won
- 1952 – United States Senate (Minnesota) (R) – won
- 1958 – United States Senate (Minnesota) (R) – lost
Fritjof Peder Thygeson
- 1970 – California’s 37th congressional district (PF) – lost
- 1972 – California’s 40th congressional district (PF) – lost
Harrison Reed Thyng
- 1966 – United States Senate (New Hampshire) (R) – lost
William Todd Tiahrt
- 1994 – Kansas’ 4th congressional district (R) – won
- 1996 – Kansas’ 4th congressional district (R) – won
- 1998 – Kansas’ 4th congressional district (R) – won
- 2000 – Kansas’ 4th congressional district (R) – won
- 2002 – Kansas’ 4th congressional district (R) – won
- 2004 – Kansas’ 4th congressional district (R) – won
- 2006 – Kansas’ 4th congressional district (R) – won
- 2008 – Kansas’ 4th congressional district (R) – won
Aldred Tiala
- 1934 – United States Senate (Minnesota) (Comm.) – lost
Harland B. Tibbetts
- 1926 – New York’s 7th congressional district (R) – lost
Harve Tibbott
- 1938 – Pennsylvania’s 27th congressional district (R, Proh., Nonpartisan) – won
- 1940 – Pennsylvania’s 27th congressional district (R) – won
- 1942 – Pennsylvania’s 27th congressional district (R) – won
- 1944 – Pennsylvania’s 26th congressional district (R) – won
- 1946 – Pennsylvania’s 26th congressional district (R) – won
- 1948 – Pennsylvania’s 26th congressional district (R) – lost
