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Membership changes in the 119th Congress

Every seat that changed hands during the 119th Congress (January 3, 2025 – September 29, 2026): 13 House vacancies (11 filled by special election, 2 still open) and 5 Senate changes, 4 filled by appointment.

Scope note: the table includes Matt Gaetz's November 2024 resignation because his FL-1 seat remained vacant into the 119th Congress until filled by special election.

House of Representatives

Thirteen seats became vacant; eleven have been filled. Special-election successors serve the remainder of the term.

Departed memberDateReasonSuccessor / status
Matt Gaetz
FL-1 · Republican		Nov 13, 2024Resigned; nominated for attorney general (nomination later withdrawn). Vacancy carried into the 119th Congress.Jimmy Patronis (R), sworn in April 2025
Mike Waltz
FL-6 · Republican		Jan 20, 2025Resigned to become national security advisor.Randy Fine (R), sworn in April 2025
Sylvester Turner
TX-18 · Democrat		Mar 5, 2025Died in office.Christian Menefee (D), sworn in Feb 2, 2026
Raúl Grijalva
AZ-7 · Democrat		Mar 13, 2025Died in office.Adelita Grijalva (D), sworn in November 12, 2025
Gerald Connolly
VA-11 · Democrat		May 21, 2025Died in office.James Walkinshaw (D), sworn in September 2025
Mark Green
TN-7 · Republican		Jul 20, 2025Resigned.Matt Van Epps (R), sworn in December 2025
Mikie Sherrill
NJ-11 · Democrat		Nov 20, 2025Resigned to become governor of New Jersey.Analilia Mejia (D), sworn in April 20, 2026
Marjorie Taylor Greene
GA-14 · Republican		Jan 5, 2026Resigned after a public break with President Trump over Epstein-file releases and other issues.Clay Fuller (R), sworn in April 14, 2026
Doug LaMalfa
CA-1 · Republican		Jan 6, 2026Died in office.James Gallagher (R), sworn in June 10, 2026
Eric Swalwell
CA-14 · Democrat		Apr 14, 2026Resigned amid sexual misconduct allegations, which he denies; had suspended a run for California governor.Aisha Wahab (D), sworn in Sep 2, 2026
Tony Gonzales
TX-23 · Republican		Apr 14, 2026Resigned amid sexual misconduct allegations and a possible expulsion vote.Vacant (details)
Sheila Cherfilus-McCormick
FL-20 · Democrat		Apr 21, 2026Resigned ahead of a House Ethics Committee expulsion recommendation; faces federal charges of stealing $5M in disaster funds. Pleaded not guilty.Vacant (details)
David Scott
GA-13 · Democrat		Apr 22, 2026Died in office.Everton Blair Jr. (D), sworn in Sep 1, 2026

Senate

Five seats changed hands or were briefly vacant; four were filled by gubernatorial appointment.

Departed memberDateReasonSuccessor / status
Marco Rubio
FL · Republican		Jan 20, 2025Resigned to become secretary of state.Ashley Moody (R), appointed; sworn in Jan 21, 2025
JD Vance
OH · Republican		Jan 10, 2025Resigned to become vice president.Jon Husted (R), appointed; sworn in Jan 21, 2025
Jim Justice
WV · Republican		Jan 3–14, 2025Delayed swearing-in to finish his term as governor of West Virginia.Jim Justice (R), sworn in Jan 14, 2025
Markwayne Mullin
OK · Republican		Mar 23, 2026Resigned to become secretary of homeland security.Alan Armstrong (R), appointed; sworn in Mar 24, 2026. Temporary appointment ending Jan 3, 2027; ineligible to run for the seat.
Lindsey Graham
SC · Republican		Jul 11, 2026Died in office.Darline Graham (R), his sister, appointed; sworn in Jul 14, 2026. First woman to represent South Carolina in the Senate.

Turnover verified against the House Clerk's vacancy register, Senate historical appointment records, and member biographies, September 2026. Current vacancies: FL-20 and TX-23.