Note: In addition to official "special" elections, this page may also include candidates running for local office (County, Municipal, etc) who don't fit into other categories.
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By default, donations made on this page will be split evenly among the boldfaced funds below, but you can also pick & choose which campaigns to support using the "Customize Amounts" tool.
Note: I include the Partisan Voter Index (PVI) rating for every district where possible according to Dave's Redistricting to give donors a general idea of how tough a district each one is.
DECEMBER 2025:
This seat became vacant after incumbent Claire Celsi (D) passed away.
JANUARY 2026:
This seat became vacant after incumbent Bobby Sanchez (D) was elected mayor of New Britain, CT.
This seat became vacant after incumbent Mandi Ballinger (R) passed away.
The seat became vacant after incumbent Chris Murphy (R) announced his intention to resign effective January 5, 2026.
This seat became vacant after incumbent Ghazala Hashmi (D) resigned following her election as lieutenant governor of VA.
The seat became vacant after Michael Jones (D) resigned to run for Virginia State Senate District 15.
This seat became vacant after incumbent Cynthia Almond (R) resigned after being appointed president of the AL Public Service Commission.
This seat became vacant after incumbent Kevin Ryan (D) passed away.
The seat became vacant after David Bulova (D) resigned following his appointment as Virginia's Secretary of Natural and Historic Resources.
The seat became vacant after Candi King (D) resigned following her appointment as Virginia's Secretary of the Commonwealth.
The seat became vacant after John Kennedy (R) resigned to run for lieutenant governor of Georgia.
This seat became vacant after incumbent Amanda Hemmingsen-Jaeger (D) was elected to the MN State Senate.
This seat became vacant after incumbent Kaohly Her (D) was elected mayor of St. Paul, MN.
FEBRUARY 2026:
The seat became vacant on October 1, 2025, after incumbent Ty Burns (R) resigned from office. Burns pleaded guilty to domestic violence charges on August 28, 2025.
The seat became vacant after Kristen Cloutier (D) resigned to accept a position as chief of staff for the president of the Maine State Senate.
MARCH 2026:
This seat became vacant after incumbent Gary Stubblefield (R) passed away.
This seat became vacant after incumbent Carlton Wing (R) resigned to take a position as CEO of Arkansas PBS.
The seat became vacant on October 1, 2025, after incumbent Edward Kennedy (D) passed away.
This seat became vacant after incumbent Joseph Bouie (D) resigned from office after he was named chancellor of Southern University at New Orleans.
This seat became vacant after Troy Romero (R) resigned.
This seat became vacant after Chad Brown (D) resigned from office following his appointment as commissioner of the LA Office of Alcohol and Tobacco Control.
This seat became vacant after Matthew Willard (D) resigned from office following his election to the New Orleans City Council.
This seat became vacant after Jason Hughes (D) resigned from office following his election to the New Orleans City Council.
The seat became vacant on August 18, 2025, after incumbent Mike Caruso (R) resigned from office following his appointment as Palm Beach County Clerk of the Circuit Court and Comptroller.
The seat became vacant on August 12, 2025, after incumbent Jay Collins (R) resigned from office following his appointment as Lieutenant Governor of Florida.
This seat became vacant after incumbent Josie Tomkow (R) resigned from office to run for Florida State Senate District 14.
This seat became vacant on after incumbent John Temple (R) resigned from office following his appointment as president of Lake-Sumter State College.
APRIL 2026:
This seat became vacant after Mikie Sherrill (D) was elected Governor of New Jersey.
MAY 2026:
This seat became vacant on after incumbent Brandon Creighton (R) resigned to accept the position of Chancellor of the TX Tech University System.
The seat became vacant due to incumbent Kristen McDonald Rivet (D) winning a U.S. House seat for MI-08.
NOVEMBER 2026:
The seat became vacant after incumbent Sonya Jaquez Lewis (D) resigned from office.
This seat became vacant after incumbent Janet Buckner (D) resigned from office.
This seat became vacant after incumbent Chris Hansen (D) resigned from office.
This seat became vacant after incumbent Forrest Bennett (D) resigned to accept the position of president of the OK AFL-CIO.
The seat became vacant after Shane Jett (R) reached his term limit.
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