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The 2022 United States Senate elections will be held on November 8, 2022, with 34 of the 100 seats in the Senate being contested in regular elections, the winners of which will serve six-year terms in the United States Congress from January 3, 2023, to January 3, 2029. Senators are divided into three groups, or classes, whose terms are staggered so that a different class is elected every two years. Class 3 senators were last elected in 2016 and will be up for election again in 2022.

All 34 Class 3 Senate seats are up for election in 2022; Class 3 currently consists of 14 Democrats and 20 Republicans. One special election for a seat held by a Democrat will be held in conjunction with the general elections: in California, to fill the final weeks of Kamala Harris's term.

As of November 2021, five Republican senators have announced they are not seeking re-election; 13 Republican senators are running for re-election; 13 Democratic senators are running for re-election; and 1 Democratic senator is not seeking re-election. Two Republicans are yet to confirm whether they intend to retire or run for re-election: Ron Johnson (R) from Wisconsin and John Thune (R) from South Dakota.

Partisan composition
In contrast to 2018, where Democrats were defending 10 seats in states that Donald Trump won in 2016, Democrats hold no seats in any state that was won by Trump in 2020. Meanwhile, the GOP is defending two seats (Wisconsin and Pennsylvania) in states President Joe Biden won in 2020, compared to just one seat (Nevada won by Hillary Clinton in 2016) that was up for grabs in 2018.

Change in composition
Each block represents one of the one hundred seats in the U.S. Senate. "D$$" is a Democratic senator, "I$$" is an Independent senator, and "R$$" is a Republican senator. They are arranged so the parties are separated and a majority is clear by crossing the middle.

Before the elections
Each block indicates an incumbent senator's actions going into the election.

Predictions
Several sites and individuals publish predictions of competitive seats. These predictions look at factors such as the strength of the incumbent (if the incumbent was running for re-election) and the other candidates, and the state's partisan lean (reflected in part by the state's Cook Partisan Voting Index rating). The predictions assign ratings to each seat, indicating the predicted advantage that a party had in winning that seat. Most election predictors use:
 * " tossup " / " battleground ": no advantage
 * " tilt " (used by some predictors): minimal, smallest advantage
 * " lean ": slight advantage
 * " likely ": significant, but surmountable, advantage
 * " safe " or " solid ": near-certain chance of victory

{| class="wikitable sortable" style="text-align:center"; ! colspan=2 | Constituency ! colspan=2 | Incumbent ! colspan="11" | 2022 election ratings ! State ! PVI ! Senator ! data-sort-type="number"| Last election ! Cook July 16, 2021 ! IE October 8, 2021 ! Sabato November 3, 2021
 * - style="vertical-align:bottom"
 * - style="vertical-align:bottom"

! Alabama |
 * data-sort-value="15" | R+15
 * data-sort-value="Shelby, Richard" | Richard Shelby (retiring)
 * data-sort-value="64.0" | 64.0% R

! Alaska | |
 * data-sort-value="9" | R+9
 * data-sort-value="Murkowski, Lisa" | Lisa Murkowski
 * data-sort-value="44.4" | 44.4% R

! Arizona |
 * data-sort-value="3" | R+3
 * data-sort-value="Kelly, Mark" | Mark Kelly
 * data-sort-value="-51.2" | 51.2% D (2020 special)

! Arkansas |
 * data-sort-value="16" | R+16
 * data-sort-value="Boozman, John" | John Boozman
 * data-sort-value="59.8" | 59.8% R

! California |
 * data-sort-value="-14" | D+14
 * data-sort-value="Padilla, Alex" | Alex Padilla
 * data-sort-value="0" | Appointed (2021)

! Colorado |
 * data-sort-value="-3" | D+3
 * data-sort-value="Bennet, Michael" | Michael Bennet
 * data-sort-value="-50.0" | 50.0% D

! Connecticut |
 * data-sort-value="-7" | D+7
 * data-sort-value="Blumenthal, Richard" | Richard Blumenthal
 * data-sort-value="-63.2" | 63.2% D

! Florida |
 * data-sort-value="3" | R+3
 * data-sort-value="Rubio, Marco" | Marco Rubio
 * data-sort-value="52.0" | 52.0% R

! Georgia |
 * data-sort-value="3" | R+3
 * data-sort-value="Warnock, Raphael" | Raphael Warnock
 * data-sort-value="-51.0" | 51.0% D (2020 special)

! Hawaii |
 * data-sort-value="-15" | D+15
 * data-sort-value="Schatz, Brian" | Brian Schatz
 * data-sort-value="-73.6" | 73.6% D

! Idaho |
 * data-sort-value="19" | R+19
 * data-sort-value="Crapo, Mike" | Mike Crapo
 * data-sort-value="66.1" | 66.1% R

! Illinois |
 * data-sort-value="-7" | D+7
 * data-sort-value="Duckworth, Tammy" | Tammy Duckworth
 * data-sort-value="-54.9" | 54.9% D

! Indiana |
 * data-sort-value="11" | R+11
 * data-sort-value="Young, Todd" | Todd Young
 * data-sort-value="52.1" | 52.1% R

! Iowa |
 * data-sort-value="6" | R+6
 * data-sort-value="Grassley, Chuck" | Chuck Grassley
 * data-sort-value="60.1" | 60.1% R

! Kansas |
 * data-sort-value="11" | R+11
 * data-sort-value="Moran, Jerry" | Jerry Moran
 * data-sort-value="62.2" | 62.2% R

! Kentucky |
 * data-sort-value="16" | R+16
 * data-sort-value="Paul, Rand" | Rand Paul
 * data-sort-value="57.3" | 57.3% R

! Louisiana |
 * data-sort-value="12" | R+12
 * data-sort-value="Kennedy, John" | John Kennedy
 * data-sort-value="60.7" | 60.7% R

! Maryland |
 * data-sort-value="-14" | D+14
 * data-sort-value="Van Hollen, Chris" | Chris Van Hollen
 * data-sort-value="-60.9" | 60.9% D

! Missouri |
 * data-sort-value="11" | R+11
 * data-sort-value="Blunt, Roy" | Roy Blunt (retiring)
 * data-sort-value="49.2" | 49.2% R

! Nevada |
 * data-sort-value="0" | EVEN
 * data-sort-value="Cortez Masto, Catherine" | Catherine Cortez Masto
 * data-sort-value="-47.1" | 47.1% D

! New Hampshire |
 * data-sort-value="0" | EVEN
 * data-sort-value="Hassan, Maggie" | Maggie Hassan
 * data-sort-value="-48.0" | 48.0% D

! New York |
 * data-sort-value="-10" | D+10
 * data-sort-value="Schumer, Chuck" | Chuck Schumer
 * data-sort-value="-70.6" | 70.6% D

! North Carolina |
 * data-sort-value="3" | R+3
 * data-sort-value="Burr, Richard" | Richard Burr (retiring)
 * data-sort-value="51.1" | 51.1% R

! North Dakota |
 * data-sort-value="20" | R+20
 * data-sort-value="Hoeven, John" | John Hoeven
 * data-sort-value="78.5" | 78.5% R

! Ohio |
 * data-sort-value="6" | R+6
 * data-sort-value="Portman, Rob" | Rob Portman (retiring)
 * data-sort-value="58.0" | 58.0% R

! Oklahoma |
 * data-sort-value="20" | R+20
 * data-sort-value="Lankford, James" | James Lankford
 * data-sort-value="67.7" | 67.7% R

! Oregon |
 * data-sort-value="-6" | D+6
 * data-sort-value="Wyden, Ron" | Ron Wyden
 * data-sort-value="-56.6" | 56.6% D

! Pennsylvania |
 * data-sort-value="2" | R+2
 * data-sort-value="Toomey, Pat" | Pat Toomey (retiring)
 * data-sort-value="48.8" | 48.8% R

! South Carolina |
 * data-sort-value="8" | R+8
 * data-sort-value="Scott, Tim" | Tim Scott
 * data-sort-value="60.6" | 60.6% R

! South Dakota |
 * data-sort-value="16" | R+16
 * data-sort-value="Thune, John" | John Thune
 * data-sort-value="71.8" | 71.8% R

! Utah |
 * data-sort-value="13" | R+13
 * data-sort-value="Lee, Mike" | Mike Lee
 * data-sort-value="68.2" | 68.2% R

! Vermont |
 * data-sort-value="-15" | D+15
 * data-sort-value="Leahy, Patrick" | Patrick Leahy (retiring)
 * data-sort-value="-60.0" | 60.0% D

! Washington |
 * data-sort-value="-8" | D+8
 * data-sort-value="Murray, Patty" | Patty Murray
 * data-sort-value="-59.0" | 59.0% D

! Wisconsin |
 * data-sort-value="2" | R+2
 * data-sort-value="Johnson, Ron" | Ron Johnson
 * data-sort-value="50.2" | 50.2% R

! colspan=4 | Overall
 * | D - 50 R - 47 3 tossups
 * | D - 46 R - 46 8 battlegrounds
 * | D - 47 R - 49 4 tossups

Democrats
One Democrat has announced his retirement, as of November 2021.

Republicans
Five Republicans have announced their retirement, as of November 2021.

Special election during the preceding Congress
In this special election, the winner's term begins immediately after their state's government certifies their election.

Elections are sorted by date, then state.

Elections leading to the next Congress
In these general elections, the winners will be elected for the term beginning January 3, 2023.

Alabama
Six-term Republican Richard Shelby was re-elected in 2016 with 64% of the vote. On February 8, 2021, Shelby announced that he would not seek re-election to a seventh term. Just weeks later, Lynda Blanchard, who served as Donald Trump's ambassador to Slovenia, announced that she would be running. On March 22, 2021, six-term Republican representative Mo Brooks, who was the first Republican to announce that he would vote against the certification of Joe Biden's election win on January 6, has announced that he will also be running. Several months later, Katie Britt, a former Chief of Staff to Shelby, announced she would run as well.

Alaska
Three-term Republican Lisa Murkowski was re-elected in 2016 with 44.4% of the vote. Former governor and vice presidential nominee Sarah Palin is considering a primary challenge to Murkowski, as are others. Alaska adopted a top-four jungle primary system in 2020, with the ultimate winner being decided via ranked-choice voting. Characterizations of the state as a "Safe" or "Solid" Republican stronghold may change if Murkowski decides to change her party affiliation to Independent as she has suggested after the Capitol Riot. If she does so, she would most likely continue to caucus with Republicans in the Senate. On March 30, Former Alaska Department of Administration Commissioner Kelly Tshibaka announced that she was running against Murkowski following the state's GOP decision to censure her, with Tshibaka later receiving former President Donald Trump’s endorsement. Orthopedic surgeon, commercial fisherman, and 2020 senate nominee Al Gross has expressed interest in running.

Republican Governor Mike Dunleavy has announced that he will not run, opting to run for re-election.

Arizona
Incumbent Democrat Mark Kelly took office on December 2, 2020, after winning a special election with 51.2% of the vote.

Six-term senator and 2008 Republican presidential nominee John McCain was re-elected to this seat in 2016. However, he died on August 25, 2018, and former U.S. Senator Jon Kyl was appointed to replace him. Kyl resigned at the end of 2018 and was succeeded by outgoing U.S. Representative Martha McSally, who lost the 2020 special election to complete the term.

Term-limited Republican governor Doug Ducey, has announced that he will not challenge Kelly in 2022. Republicans Blake Masters, the chairman of the Thiel foundation, Jim Lamon, chair of the solar power company Depcom, and Arizona Attorney General Mark Brnovich have announced their candidacies against Kelly. Other potential Republican candidates include US Representative Andy Biggs and Arizona State Republican Party Chairwoman Kelli Ward.

Arkansas
Two-term Republican John Boozman was re-elected in 2016 with 59.8% of the vote. Boozman has announced that he is running for a third term.

Former NFL player and U.S. Army Veteran Jake Bequette, Jan Morgan, an Arkansas gun range owner and 2018 gubernatorial candidate, and Heath Loftis, a pastor from Stuttgart are all challenging Boozman in the Republican primary.

A fourth challenger, Corporate analyst Michael Deel has withdrawn from the race citing a lack of viability

Dan Whitfield, who attempted to run as an independent for Arkansas' other U.S. Senate seat in 2020 but failed to meet the ballot access requirements, is running as a Democrat, along with Natalie James, a real estate broker from Little Rock. Former Pine Bluff city alderman Jack Foster is also running for the Democratic nomination.

California
Incumbent Democrat Alex Padilla took office on January 20, 2021. He was appointed by Governor Gavin Newsom following the resignation of incumbent Democrat Kamala Harris on January 18, 2021 in advance of her swearing-in as Vice President of the United States.

Due to a rule change, there will be two ballot items for the same seat: a general election, to elect a Class 3 Senator to a full term beginning with the 118th United States Congress, sworn in on January 3, 2023, and a special election, to fill that seat for the final weeks of the 117th Congress. Padilla is running to fill the seat for the remainder of the current term, and for election to a full term.

Internet executive and 2018 Republican congressional candidate Elizabeth Heng has announced her candidacy.

Colorado
Two-term Democrat Michael Bennet took office on January 21, 2009, after being appointed by then governor Bill Ritter to replace outgoing Democrat Ken Salazar, who was nominated by President Barack Obama to serve as United States Secretary of the Interior. He narrowly won an election to a full term in 2010, and to a second term in 2016, with 49.97% of the vote. Peter Yu, Republican nominee for CO-02 in 2018, has formed an exploratory committee.

In August 2021, Eli Bremer, Olympic athlete, U.S. Air Force major, and former chair of the El Paso Republican Party, announced his candidacy.

Connecticut
Two-term Democrat Richard Blumenthal was re-elected in 2016 with 63.2% of the vote. Republican lobbyist Robert F. Hyde is running.

Florida
Two-term Republican Marco Rubio was re-elected in 2016 with 52% of the vote. He announced on November 9, 2020, via Facebook, that he is running for re-election.

U.S. Representative Val Demings and former U.S. Representative Alan Grayson are running for the Democratic nomination.

Other possible Democratic candidates include Representative Ted Deutch, former Representatives Gwen Graham, and Debbie Mucarsel-Powell, and State Senator Jason Pizzo.

Former U.S. Representative David Jolly, who was previously a Republican, but is now independent, is considering running.

Ivanka Trump, daughter and former Senior Advisor to former President Donald Trump, was seen as a potential candidate to primary Rubio for the Republican nomination. However, on February 18, 2021, it was confirmed that she would not seek the nomination.

Georgia
Incumbent Democrat Raphael Warnock won the 2020–2021 special election against incumbent Republican Kelly Loeffler to fill the remainder of former Sen. Johnny Isakson's term. (Isakson had resigned at the end of 2019, and Loeffler was appointed by Governor Brian Kemp following Isakson's resignation.) No candidate in the open election on November 3 received the 50% required by Georgia law to avoid a run-off, a type of election colloquially known as a "jungle primary" —Warnock received just 32.9% of the vote—and so, a run-off election between Warnock and Loeffler was held on January 5, 2021, which Warnock won with 51% of the vote.

Former Republican senator David Perdue, who narrowly lost his race to Democratic challenger Jon Ossoff in 2021, filed paperwork to run for this seat. A week after filing the paperwork, however, Perdue announced that he would not pursue another race for the Senate. Loeffler is considering running again. U.S. Representative Drew Ferguson has stated that he is seriously considering running. Banking executive Latham Saddler is another Republican challenger. On April 11, 2021, Former NFL player and Georgia native Herschel Walker also stated that he is considering a run against Warnock, despite currently residing in Texas. He has been endorsed by former President Donald Trump after his suggestion. In August, Walker officially announced that he would launch his candidacy for Senate. Former U.S. Representative Doug Collins considered running against Warnock, but on April 26, 2021, he announced that he would not do so, and then, endorsed Gary Black.

Hawaii
One-term Democrat Brian Schatz was appointed to the Senate in 2012, following the death of incumbent Daniel Inouye. He won a special election to finish Inouye's term in 2014, and won his first full term in 2016 with 73.6% of the vote.

Idaho
Four-term Republican Mike Crapo was re-elected in 2016 with 66.1% of the vote.

Illinois
One-term Democrat Tammy Duckworth was elected in 2016 with 54.9% of the vote. Former police officer, US Navy Veteran, and 2020 Senate candidate, Peggy Hubbard is running as a Republican.

Indiana
One-term Republican Todd Young was elected in 2016 with 52.1% of the vote. He announced on March 2, 2021, that he is running for re-election. Democratic Hammond Mayor Thomas McDermott, Jr., has announced that he would run.

Iowa
Seven-term Republican Chuck Grassley was re-elected in 2016 with 60.1% of the vote. He is seeking re-election to an eighth term.

State Senator Jim Carlin has announced a primary challenge to Grassley.

In July 2021, former U.S Representative Abby Finkenauer announced that she was running for the seat in 2022. In her announcement, Finkenauer cited her working class and small-town roots, and criticized Grassley for not taking a strong stance against the 2021 United States Capitol attack, citing his vote against an independent commission investigating the attack. Potential Democratic candidates include retired Admiral and former aide to U.S. Senator Ted Kennedy, Michael T. Franken, 2020 U.S. Senate nominee Theresa Greenfield, attorney and Broadlawns Polk County hospital board member Emily Webb, businessman and teacher Eddie Mauro, Iowa State Auditor Rob Sand, and veteran Cal Woods.

Kansas
Two-term Republican Jerry Moran was re-elected in 2016 with 62.2% of the vote. He has announced that he will be seeking re-election.

Kentucky
Two-term Republican Rand Paul was re-elected in 2016 with 56.3% of the vote. He is running for re-election to a third term.

Charles Booker, former Democratic State Representative for Kentucky's 43rd legislative district and runner-up in the Democratic Senate primary in 2020, has announced that he is running against Paul.

Louisiana
One-term Republican John Kennedy was elected in 2016 with 60.6% of the vote and has announced his intention to run for a second term.

Louisiana Governor John Bel Edwards, a Democrat who will be term-limited in 2023, may run in the jungle primary.

Maryland
One-term Democrat Chris Van Hollen was elected in 2016 with 60.9% of the vote, and is running for a second term.

Despite saying early on that he had no interest in pursuing the Republican nomination for the U.S. Senate, incumbent Governor of Maryland Larry Hogan, who is term-limited and will leave office in 2022, told conservative talk radio host Hugh Hewitt that he is considering challenging Democratic Sen. Van Hollen in the mid-term elections.

Missouri
Two-term Republican Roy Blunt was re-elected in 2016 with 49.2% of the vote. He is not seeking re-election.

Former Governor of Missouri Eric Greitens is running in the Republican primary. Attorney General Eric Schmitt has also announced that he is running. U.S. Representative Vicky Hartzler announced her bid in June 2021. In August 2021, US Representative Billy Long declared his candidacy.

Though subject to speculation, US Representative Ann Wagner will not be running for the open Senate seat, opting to run for re-election.

Marine veteran Lucas Kunce announced his candidacy shortly after Senator Blunt announced his retirement. Tech executive and LGBT rights activist Tim Shepard has declared he is running for the Democratic nomination. Former state senator Scott Sifton has filed to run in the Democratic primary.

Nevada
One-term Democrat Catherine Cortez Masto was elected in 2016 with 47.1% of the vote. She is seeking re-election.

On August 17, former Nevada Attorney General Adam Laxalt has announced that he will be running against Cortez Masto for the seat once held by his maternal grandfather Paul Laxalt. Nevada State Senator Heidi Gansert is seen as a potential Republican candidate.

New Hampshire
One-term Democrat Maggie Hassan was elected in 2016 with 48% of the vote. She is running for re-election.

Retired U.S. Army general Don Bolduc has declared his candidacy as a Republican, having previously run in the 2020 Republican primary in New Hampshire.

Governor Chris Sununu, who was re-elected in 2020 with 65.2% of the vote, will not be running.

New York
Four-term Democrat and Senate Majority Leader Chuck Schumer was re-elected in 2016 with 70.6% of the vote. He is seeking re-election. Sam Seder, the host of The Majority Report with Sam Seder, has expressed interest in challenging Schumer for the Democratic nomination. Human rights activist Khaled Salem is challenging Schumer in the primary.

Alexandria Ocasio-Cortez, Democratic Congresswoman for New York's 14th congressional district, who successfully defeated long-time incumbent Democrat Joe Crowley in an upset 2018 primary campaign, has been floated as a possible primary challenger to Schumer.

North Carolina
Three-term Republican Richard Burr was re-elected in 2016 with 51.0% of the vote. Burr has pledged to retire in 2022.

Former U.S. Representative Mark Walker is running in the Republican primary, as are former North Carolina Governor Pat McCrory and U.S. Representative Ted Budd, who has been endorsed by former President Donald Trump.

Potential Republican candidates include former Lieutenant Governor Dan Forest, former U.S. Representative George Holding, and North Carolina House Speaker Tim Moore.

Though subject to speculation, Lara Trump, daughter-in-law of former President Donald Trump has decided not to run for the seat

North Carolina Lieutenant Governor Mark Robinson stated that he was seriously considering running, but on April 19 he announced that he would not run.

Former Chief Justice of the North Carolina Supreme Court Cheri Beasley, State senator Jeff Jackson, Beaufort mayor Rett Newton and former state senator Erica D. Smith are running in the Democratic primary. Potential Democratic candidates include North Carolina Supreme Court Associate Justice Anita Earls, state representative Grier Martin, U.S. Representative Deborah K. Ross, and Attorney General Josh Stein.

North Dakota
Two-term Republican John Hoeven was re-elected in 2016 with 78.5% of the vote. On February 4, 2021, Hoeven campaign spokesman Dan Larson has indicated Hoeven is running for re-election in 2022.

Ohio
Two-term Republican Rob Portman was re-elected in 2016 with 58% of the vote. On January 25, 2021, he announced that he would not be running for re-election.

Josh Mandel, former Ohio State Treasurer, nominee for U.S. Senate in 2012, and candidate for U.S. Senate in 2018 has announced his candidacy for the Republican nomination. Former Ohio Republican Party chair Jane Timken is also running. Venture Capitalist JD Vance officially entered the race on July 1, 2021, after months of speculation.

U.S. Representative and 2020 presidential candidate Tim Ryan is running for the Democratic nomination, as is former Senior Advisor at the Consumer Financial Protection Bureau and 2020 congressional candidate Morgan Harper.

Other potential Democratic candidates include Columbus City Attorney Zach Klein and Ohio House Minority Leader Emilia Sykes.

Oklahoma
One-term Republican James Lankford won the 2014 special election to serve the remainder of former senator Tom Coburn's term. Lankford won election to his first full term in 2016 with 67.7% of the vote. He announced that he would be running for re-election on April 6, 2021.

Jackson Lahmeyer, pastor for Sheridan Church and former Oklahoma State Coordinator for the Billy Graham Evangelistic Association, announced he would challenge Lankford in the Republican primary.

Oregon
Four-term Democrat Ron Wyden was re-elected in 2016 with 56.6% of the vote. He is seeking re-election. Prineville Mayor Jason Beebe has declared his candidacy as a Republican.

Pennsylvania
Two-term Republican Pat Toomey was re-elected in 2016 with 48.8% of the vote. On October 5, 2020, Toomey announced that he will retire at the end of his term.

Declared candidates for the Democratic primary include Lieutenant Governor John Fetterman, state Representative Malcolm Kenyatta, U.S. Representative Conor Lamb, Montgomery County Commissioner Valerie Arkoosh, and Dr. Kevin Baumlin.

Declared Republican candidates include 2018 Senate candidate Jeff Bartos, 2018 candidate for Pennsylvania's 7th congressional district Sean Gale, political commentator Kathy Barnette, Former U.S. Ambassador to Denmark Carla Sands and 2020 nominee for Pennsylvania's 17th congressional district Sean Parnell, who has been endorsed by former president Donald Trump.

Given Toomey's retirement and Pennsylvania's designation as a swing state, several other Republicans and Democrats have been mentioned as potential candidates.

South Carolina
One-term Republican Tim Scott was appointed in 2013 and won election to his first full term in 2016 with 60.6% of the vote. He said that while he is running for re-election in 2022, it would be his last time. Democratic State Representative Krystle Matthews is challenging Scott, as is Angela Geter, chairwoman of the Spartanburg County Democratic Party.

South Dakota
Three-term Republican and Senate Minority Whip John Thune was re-elected in 2016 with 71.8% of the vote. He has stated that he intends to run for a fourth term. Thune has been subject to some backlash from former President Trump and his supporters in the state of South Dakota, leading to speculation of a potential primary challenge. In September 2021, Thune again opened up speculation that he would retire rather than run for re-election.

Utah
Two-term Republican Mike Lee was re-elected in 2016 with 68.2% of the vote. His campaign was launched prior to February 9, 2021. Evan McMullin, political activist, former CIA operations officer, and 2016 presidential candidate has declared he will run for Senator Lee's seat in the 2022 election.

Vermont
The most senior senator, eight-term Democrat and President Pro Tempore Patrick Leahy was re-elected in 2016 with 61.3% of the vote. On November 15, 2021, Leahy announced that he would not seek re-election to a ninth term, instead opting to retire.

Washington
Five-term Democrat Patty Murray was re-elected in 2016 with 59.0% of the vote. She is running for re-election to a sixth term.

Republican nurse Tiffany Smiley is running.

Wisconsin
Two-term Republican Ron Johnson was re-elected in 2016 with 50.2% of the vote. Johnson had previously pledged to retire in 2022, but is currently undecided as to whether he'll seek re-election.

Should Ron Johnson retire, Kenosha County Sheriff David Beth has expressed an interest in running for the Senate. Former Governor Scott Walker has said that he will not run.

On October 23, 2020, Outagamie County Executive Tom Nelson, filed as a Democrat. On February 17, 2021, Alex Lasry, Senior Vice President of the Milwaukee Bucks, declared his candidacy for the Democratic nomination. State Treasurer Sarah Godlewski joined the race on April 14. Lieutenant Governor Mandela Barnes entered the race on July 20.