Leo C. Zeferetti
- 1974 – New York’s 15th congressional district (D) – won
- 1976 – New York’s 15th congressional district (D, CON) – won
- 1978 – New York’s 15th congressional district (D, CON) – won
- 1980 – New York’s 15th congressional district (D) – won
- 1982 – New York’s 14th congressional district (D) – lost
Frank P. Zeidler
- 1946 – Wisconsin’s 5th congressional district (S) – lost
Timothy Zeidner
- 2018 – Utah’s 3rd congressional district (United Utah) – lost
Eugene N. Zeigler
- 1972 – United States Senate (South Carolina) (D) – lost
Fred Zeigler
- 1986 – South Carolina’s 2nd congressional district (D) – lost
John A. Zeigler
- 1928 – Michigan’s 5th congressional district (Workers) – lost
Lipa Zeirn
- 1926 – New York’s 4th congressional district (S) – lost
Louis A. Zeitlin
- 1924 – Colorado’s 1st congressional district (I) – lost
Joshua Michael Zeitz
- 2008 – New Jersey’s 4th congressional district (D) – lost
Charles John Zekan
- 1982 – California’s 19th congressional district (PF) – lost
- 1984 – California’s 19th congressional district (PF) – lost
Jerry Zeldin
- 1982 – New Jersey’s 1st congressional district (L) – lost
- 1984 – New Jersey’s 1st congressional district (L) – lost
- 1986 – New Jersey’s 1st congressional district (L) – lost
- 1988 – United States Senate (New Jersey) (L) – lost
- 1990 – New Jersey’s 1st congressional district (L) – lost
- 1992 – New Jersey’s 1st congressional district (L) – lost
Lee M. Zeldin
- 2008 – New York’s 1st congressional district (R, CON) – lost
- 2014 – New York’s 1st congressional district (R, CON) – won
- 2016 – New York’s 1st congressional district (R, CON, Ref.) – won
- 2018 – New York’s 1st congressional district (R, CON, IND, Ref.) – won
- 2020 – New York’s 1st congressional district (R, CON, IND) – won
Herbert Zelenko
- 1954 – New York’s 21st congressional district (D, Liberal) – won
- 1956 – New York’s 21st congressional district (D, Liberal) – won
- 1958 – New York’s 21st congressional district (D, Liberal) – won
- 1960 – New York’s 21st congressional district (D) – won
Frank George Zelezinski
- 1928 – Illinois’ 4th congressional district (R) – lost
- 1930 – Illinois’ 4th congressional district (R) – lost
- 1934 – Illinois’ 4th congressional district (R) – lost
William H. Zeliff, Jr.
- 1990 – New Hampshire’s 1st congressional district (R) – won
- 1992 – New Hampshire’s 1st congressional district (R) – won
- 1994 – New Hampshire’s 1st congressional district (R) – won
William J. Zelko, Jr.
- 1982 – New Jersey’s 5th congressional district (L) – lost
Vivian F. Zellar
- 1920 – Michigan’s 4th congressional district (Proh.) – lost
Matthew C. Zeller
- 2010 – New York’s 29th congressional district (D, WF) – lost
Richard Zeller
- 1960 – Michigan’s 17th congressional district (Proh.) – lost
Rudolf Zeller
- 1974 – Michigan’s 19th congressional district (SW) – lost
Benjamin M. Zelman
- 1940 – New York’s 19th congressional district (American Labor) – lost
- 1968 – New York’s 9th congressional district (AI) – lost
Louis Zeltner
- 1922 – New York’s 12th congressional district (R) – lost
Louis Zemel
- 1980 – United States Senate (Connecticut) (Citizens) – lost
Allen Zemmol
- 1968 – Michigan’s 18th congressional district (D) – lost
Bryce F. Zender, Jr.
- 1974 – Michigan’s 3rd congressional district (Human Rights) – lost
Elias R. Zenkich
- 1992 – Illinois’ 5th congressional district (R) – lost
Renee Zeno
- 2018 – New York’s 26th congressional district (R) – lost
Rob Zerban
- 2012 – Wisconsin’s 1st congressional district (D) – lost
- 2014 – Wisconsin’s 1st congressional district (D) – lost
Jerry Zerg
- 1982 – California’s 24th congressional district (R) – lost
Jerry Zerg
- 1984 – California’s 24th congressional district (R) – lost
Louis A. Zetlin
- 1930 – Colorado’s 1st congressional district (Comm.) – lost
Steve Zetterberg
- 1950 – California’s 12th congressional district (D) – lost
Mark Zetzer
- 2014 – Ohio’s 11th congressional district (R) – lost
Anthony J. ‘Tony’ Zevgolis
- 1992 – Virginia’s 4th congressional district (R) – lost
- 1996 – Virginia’s 4th congressional district (R) – lost
Li Zhao
- 2008 – Hawaii’s 1st congressional district (L) – lost
Joseph S. Ziccardi
- 1970 – Pennsylvania’s 1st congressional district (R) – lost
Wayne W. Ziebarth
- 1974 – Nebraska’s 3rd congressional district (D) – lost
James L. Ziegeweld
- 1990 – Wisconsin’s 3rd congressional district (D) – lost
Arnold Ziegler
- 1930 – Michigan’s 5th congressional district (Workers) – lost
Gil Ziegler
- 1994 – Michigan’s 1st congressional district (R) – lost
Jerome M. Ziegler
- 1962 – Illinois’ 14th congressional district (D) – lost
- 1964 – Illinois’ 14th congressional district (D) – lost
Ronald G. Ziegler
- 1974 – Michigan’s 2nd congressional district (Labor) – lost
- 1976 – Michigan’s 2nd congressional district (Labor) – lost
Jennifer Zielinski
- 2018 – Minnesota’s 5th congressional district (R) – lost
John A. Zierhut
- 1970 – Wisconsin’s 4th congressional district (AI) – lost
Charlotte T. Zietlow
- 1978 – Indiana’s 7th congressional district (D) – lost
Frederick Nicholas Zihlman
- 1920 – Maryland’s 6th congressional district (R) – won
- 1922 – Maryland’s 6th congressional district (R) – won
- 1924 – Maryland’s 6th congressional district (R) – won
- 1926 – Maryland’s 6th congressional district (R) – won
- 1928 – Maryland’s 6th congressional district (R) – won
- 1930 – Maryland’s 6th congressional district (R) – lost
- 1934 – Maryland’s 6th congressional district (R) – lost
Frank Zilaitis
- 2008 – Florida’s 15th congressional district (I) – lost
Walter F. Zilke
- 1980 – Illinois’ 8th congressional district (R) – lost
David Zilly
- 1986 – United States Senate (Arizona) (W/I) – lost
Christian Zimm
- 2022 – Georgia’s 5th congressional district (R) – lost
