[This blog post was updated on April 19, 2024]
Of the current 100 Senators, 48 are Democrats, 49 are Republicans, and 3 are Independents.
If we’ve learned anything from the 2022 elections, it’s that one senator can make a significant difference on some extremely consequential issues, especially if the party control of the Senate is close.
It’s never too early for reelection vision time. The time to start organizing is now.
There are a total of 535 Members of Congress. 100 serve in the U.S. Senate, and 435 serve in the U.S. House of Representatives.
Each state sends two Senators to represent their state in the U.S. Senate. In the Senate, the majority has the power to schedule when various bills come to the floor for voting, but a single Senator can slow legislation from coming to the floor for a vote.
Since debate in the Senate is not concluded until 60 Senators vote for a cloture motion to approve a bill for consideration, the majority must also coordinate with the minority party to set the rules for debate on legislation.
Under this system, legislation can be debated for one or two weeks on the Senate floor alone.
Senators serve a six-year term, and elections to the Senate are staggered over even years so that approximately 1/3 of the Senate is up for reelection during any election.
To contact your Senator, click here.
Below are the Senate seats up for reelection in alphabetical order by political party, reelection year, and state.
Democrats up for reelection in 2024:
California: Laphonza Butler (Not running for re-election)
Connecticut: Chris Murphy
Delaware: Tom Carper (Retiring)
Hawaii: Mazie Hirono
Maryland: Ben Cardin (Retiring)
Massachusetts: Elizabeth Warren
Michigan: Debbie Stabenow (Retiring)
Minnesota: Amy Klobuchar
Montana: Jon Tester
Nevada: Jacky Rosen
New Jersey: Bob Menendez (Won’t seek re-election as a Democrat, but didn’t rule out in Independent bid)
New Mexico: Martin Heinrich
New York: Kirsten Gillibrand
Ohio: Sherrod Brown
Pennsylvania: Bob Casey Jr.
Rhode Island: Sheldon Whitehouse
Virginia: Tim Kaine
Washington: Maria Cantwell
West Virginia: Joe Manchin (Retiring)
Wisconsin: Tammy Baldwin
Independents up for reelection in 2024:
Arizona: Kyrsten Sinema (Retiring)
Maine: Angus King
Vermont: Bernie Sanders
Republicans up for reelection in 2024:
Florida: Rick Scott
Indiana: Mike Braun (Braun is running for Governor in 2024. Representative Jim Banks announced he will run for Braun’s Senate seat.)
Mississippi: Roger Wicker
Missouri: Josh Hawley
Nebraska: Deb Fischer
North Dakota: Kevin Cramer
Oklahoma: Markwayne Mullin
Tennessee: Marsha Blackburn
Texas: Ted Cruz
Utah: Mitt Romney (Retiring)
Wyoming: John Barrasso
Democrats up for reelection in 2026:
Colorado: John Hickenlooper
Delaware: Chris Coons
Georgia: Jon Ossoff
Illinois: Dick Durbin
Massachusetts: Ed Markey
Michigan: Gary Peters
Minnesota: Tina Smith
New Hampshire: Jeanne Shaheen
New Jersey: Cory Booker
New Mexico: Ben Ray Lujan
Oregon: Jeff Merkley
Rhode Island: Jack Reed
Virginia: Mark Warner
Republicans up for reelection in 2026:
Alabama: Tommy Tuberville
Alaska: Dan Sullivan
Arkansas: Tom Cotton
Idaho: James Risch
Iowa: Joni Ernst
Kansas: Roger Marshall
Kentucky: Mitch McConnell
Louisiana: Bill Cassidy
Maine: Susan Collins
Mississippi: Cindy Hyde-Smith
Montana: Steve Daines
Nebraska: Ben Sasse
North Carolina: Thom Tillis
South Carolina: Lindsey Graham
South Dakota: Mike Rounds
Tennessee: Bill Hagerty
Texas: John Cornyn
West Virginia: Shelley Moore Capito
Wyoming: Cynthia Lummis
Democrats up for reelection in 2028:
Arizona: Mark Kelly
California: Alex Padilla
Colorado: Michael Bennet
Connecticut: Richard Blumenthal
Georgia: Raphael Warnock
Hawaii: Brian Schatz
Illinois: Tammy Duckworth
Maryland: Chris Van Hollen
Nevada: Catherine Cortez Masto
New Hampshire: Maggie Hassan
New York: Chuck Schumer
Oregon: Ron Wyden
Pennsylvania: John Fetterman
Vermont: Peter Welch
Washington: Patty Murray
Republicans up for reelection in 2028:
Alabama: Katie Britt
Alaska: Lisa Murkowski
Arkansas: John Boozman
Florida: Marco Rubio
Idaho: Mike Crapo
Indiana: Todd Young
Iowa: Chuck Grassley
Kansas: Jerry Moran
Kentucky: Rand Paul
Louisiana: John N. Kennedy
Missouri: Eric Schmitt
North Carolina: Ted Budd
North Dakota: John Hoeven
Ohio: JD Vance
Oklahoma: James Lankford
South Carolina: Tim Scott
South Dakota: John Thune
Utah: Mike Lee
Wisconsin: Ron Johnson