United States Senate elections, 2018

← 2016 November 6, 2018 2020 →
Class 1 (33 of the 100) seats in the United States Senate 51 seats needed for a majority
File:2018 US Senate election seats.png Senate Seats up for election:   Democratic incumbent   Retiring Democrat   Republican incumbent   Retiring Republican   Unknown incumbent   No election
Majority Leader before election TBD Elected Majority Leader TBD

Elections for the United States Senate will be held on November 6, 2018, with 33 of the 100 seats in the Senate being contested in regular elections whose winners will serve six-year terms from January 3, 2019 until January 3, 2025. Additionally, special elections may be held to fill vacancies that occur during the 114th United States Congress, the 115th United States Congress and the 116th United States Congress. Currently, Democrats are expected to have 23 seats up for election, in addition two 2 independents who caucus with the Democrats. Republicans are expected to have 8 seats up for election.

The elections to the United States House of Representatives, elections for governors in states and territories, and many state and local elections will also be held on this date.

The composition of the Senate going into the 2018 election will depend on the results of the 2014 and 2016 elections. Among the senators up for election in 2018, there will be 23 Democrats, two independents who caucus with Democrats, and 8 Republicans.

There may be some additional changes if senators die or resign. If senators in other classes die or resign between 2012 and 2018, there may be additional special elections between the beginning of the 113th Congress (on January 3, 2013), and the 2014 election. The dates between which the death or resignation of a senator would lead a special election during this time period vary from state to state.

State	Incumbent	Party	Status	Other candidates	2010 election results
Arizona	Jeff Flake	Republican			Jeff Flake (R) 49.2% Richard Carmona (D) 46.1%
California	Dianne Feinstein	Democratic			Dianne Feinstein (D) 62.5% Elizabeth Emken (R) 37.5%
Connecticut	Chris Murphy	Democratic			Chris Murphy (D) 54.8% Linda McMahon (R) 43.1%
Delaware	Tom Carper	Democratic			Tom Carper (D) 66.4% Kevin Wade (R) 29.0%
Florida	Bill Nelson	Democratic			Bill Nelson (D) 55.2% Connie Mack IV (R) 42.2%
Hawaii	Mazie Hirono	Democratic			Mazie Hirono (D) 62.6% Linda Lingle (R) 37.4%
Indiana	Joe Donnelly	Democratic			Joe Donnelly (D) 50.0% Richard Mourdock (R) 44.2%
Maine	Angus King	Independent			Angus King (I) 52.9% Charles E. Summers, Jr. (I) 30.7% Cynthia Dill (D) 13.3%
Maryland	Ben Cardin	Democratic			Ben Cardin (D) 56.0% Dan Bongino (R) 26.3%
Massachusetts	Elizabeth Warren	Democratic			Elizabeth Warren (D) 53.7% Scott Brown (R) 46.3%
Michigan	Debbie Stabenow	Democratic			Debbie Stabenow (D) 58.8% Pete Hoekstra (R) 38.0%
Minnesota	Amy Klobuchar	Democratic			Amy Klobuchar (D) 65.2% Kurt Bills (R) 30.5%
Mississippi	Roger Wicker	Republican			Roger Wicker (R) 57.2% Albert N. Gore, Jr. (D) 40.6%
Missouri	Claire McCaskill	Democratic			Claire McCaskill (D) 54.8% Todd Akin (D) 39.0%
Montana	Jon Tester	Democratic			Jon Tester (D) 48.6% Denny Rehberg (R) 44.9%
Nebraska	Deb Fischer	Republican			Deb Fischer (R) 57.8% Bob Kerrey (D) 44.2%
Nevada	Dean Heller	Republican			Dean Heller (R) 45.9% Shelley Berkley (D) 44.7%
New Jersey	Bob Menendez	Democratic			Bob Menendez (D) 58.9% Joe Kyrillos (R) 39.4%
New Mexico	Martin Heinrich	Democratic			Martin Heinrich (D) 51.0% Heather Wilson (R) 45.3%
New York	Kirsten Gillibrand	Democratic			Kirsten Gillibrand (D) 71.6% Wendy E. Long (R) 26.0%
North Dakota	Heidi Heitkamp	Democratic			Heidi Heitkamp (D) 50.2% Rick Berg (R) 49.3%
Ohio	Sherrod Brown	Democratic			Sherrod Brown (D) 50.7% Josh Mandel (R) 44.7%
Pennsylvania	Bob Casey, Jr.	Democratic			Bob Casey, Jr. (D) 53.7% Tom Smith (R) 44.6%
Rhode Island	Sheldon Whitehouse	Democratic			Sheldon Whitehouse (D) 64.8% Barry Hinckley (R) 35.0%
Tennessee	Bob Corker	Republican			Bob Corker (R) 64.9% Mark E. Clayton (D) 30.4%
Texas	Ted Cruz	Republican			Ted Cruz (R) 56.5% Paul Sadler (D) 40.7%
Utah	Orrin Hatch	Republican			Orrin Hatch (R) 65.3% Scott Howell (D) 30.0%
Vermont	Bernie Sanders	Independent			Bernie Sanders (I) 71% John MacGovern (R) 24.9%
Virginia	Tim Kaine	Democratic			Tim Kaine (R) 52.9% George Allen (D) 47%
Washington	Maria Cantwell	Democratic			Maria Cantwell (D) 60.5% Michael Baumgartner (R) 39.5%
West Virginia	Joe Manchin	Democratic			Joe Manchin (D) 60.6% John Raese (R) 36.5%
Wisconsin	Tammy Baldwin	Democratic			Tammy Baldwin (D) 51.4% Tommy Thompson (R) 45.5%
Wyoming	John Barrasso	Republican			John Barrasso (R) 75.7% Tim Chestnut (D) 21.7%

Thirty-three seats are up for election in 2018:

• Twenty three Democrat may seek re-election.
• Eight Republicans may seek re-election.
• Two independents who caucus with Republicans may seek re-election.

One-term Republican Senator Jeff Flake was elected with 49.2% of the vote in 2012. He will be 55 years old in 2018. He previously served five terms in the House.

Four-term Democratic Senator Dianne Feinstein won a special election in 1992 and was elected to full terms in 1994, 2000, 2006, and 2012. She won re-election in 2012 with 62.5% of the vote. She will be 85 years old in 2018.

One-term Democratic Senator Chris Murphy was elected with 54.8% of the vote in 2012. He previously served three terms in the House. He will be 45 years old in 2018.

Three-term Democratic Senator Tom Carper won re-election with 66.4% of the vote in 2012. He will be 71 years old in 2018.

Three-term Democratic Senator Bill Nelson was re-elected with 55.2% of the vote in 2012. He will be 76 years old in 2018.

One-term Democratic Senator Mazie Hirono was elected with 62.6% of the vote in 2012. She previously served three terms in the House. She will be 71 years old in 2018.

One-term Democratic Senator Joe Donnelly was elected with 50% of the vote in 2010. He previously served three terms in the House. He will be 63 years old in 2018.

One-term Independent Senator Angus King was elected in a three-way race with 52.9% of the vote in 2012. He previously served Governor of Maine from 1995-2003. He will be 74 years old in 2018. King caucuses with the Democratic Party.

Two-term Democratic Senator Ben Cardin was re-elected with 56% of the vote in 2012. He will be 75 years old in 2018.

One-term Democratic Senator Elizabeth Warren defeated Scott Brown with 53.7% of the vote in 2012. She previously served as the Special Advisor for the Consumer Financial Protection Bureau. She will be 69 years old in 2018.

Three-term Democratic Senator Debbie Stabenow was re-elected with 58.8% of the vote in 2012. She will be 68 years old in 2018.

Two-term Democratic Senator Amy Klobuchar was re-elected with 65.2% of the vote in 2012. She will be 58 years old in 2018.

One-term Republican Senator Roger Wicker won re-election with 57.2% of the vote in 2012. He was previously appointed Senator in 2007 after Trent Lott vacated the seat. Wicker won a special election in 2008 to keep the seat. He will be 67 years old in 2018.

Two-term Democratic Senator Claire McCaskill was re-elected with 54.8% of the vote in 2012. She will be 65 years old in 2016.

Two-term Democratic Senator Jon Tester was re-elected with 57.8% of the vote in 2012. She will be 67 years old in 2018.

One-term Republican Senator Deb Fischer was elected with 55.7% of the vote in 2010. He will be 53 years old in 2018.

One-term Republican Senator Dean Heller was elected with 45.9% of the vote in 2012. He had been appointed to the seat in 2011. Heller previously served two terms in the House, and three terms as [Secretary of State of Nevada]. He will be 55 years old in 2018.

Two-term Democratic Senator Bob Menendez was re-elected with 58.9% of the vote in 2012. Menendez was originally appointed to the seat in January 2006. He will be 64 years old in 2018.

One-term Democratic Senator Martin Heinrich was elected with 51% of the vote in 2012. He will be 47 years old in 2018. Heinrich previously served two terms in the House.

One-term Democratic Senator Kirsten Gillibrand was elected with 71.6% of the vote in 2012. She had previously been appointed to the seat in 2009, and won a special election in 2010. Gillibrand previously was elected to two terms in the House. She will be 51 years old in 2018.

One-term Democratic Senator Heidi Heitkamp was elected with 50.2% of the vote in 2012. Heitkamp previously served two terms as Attorney General of North Dakota. She will be 63 years old in 2018.

Two-term Democratic Senator Sherrod Brown was re-elected with 50.7% of the vote in 2012. He will be 65 years old in 2018.

Two-term Democratic Senator Bob Casey, Jr. was re-elected with 53.7% of the vote in 2012. Casey is the son of former Governor of Pennsylvania Robert P. Casey. He will be 58 years old in 2018.

Two-term Democratic Senator Sheldon Whitehouse was elected with 63.8% of the vote in 2012. He will be 63 years old in 2016.

Two-term Republican Senator Bob Corker was elected with 64.9% of the vote in 2012. He will be 66 years old in 2016.

One-term Republican Senator Ted Cruz was elected with 56.5% of the vote in 2012. He will be 47 years old in 2018.

Seven-term Republican Senator Orrin Hatch was re-elected with 65.3% of the vote in 2012. Hatch is the most senior Republican Senator, as well as second most-senior member, behind only President pro tempore Patrick Leahy. He will be 84 years old in 2016.

Two-term Independent Senator Bernie Sanders was re-elected with 71% of the vote in 2012. Sanders is a self-described democratic socialist.^[1][2] Sanders caucuses with the Democratic Party. He will be 77 years old in 2018

One-term Democratic Senator Tim Kaine was elected with 52.9% of the vote in 2012. He previously as Chairperson of the Democratic National Committee, and served one term as Governor of Virginia. He will be 60 years old in 2018.

Three-term Democratic Senator Maria Cantwell was re-elected with 60.5% of the vote in 2012. She will be 60 years old in 2018.

One-term Democratic Senator Joe Manchin was elected with 60.6% of the vote in 2012. He previously served as Governor of West Virginia. He will be 71 years old in 2018.

One-term Democratic Senator Tammy Baldwin was elected with 51.4% of the vote in 2012. Baldwin previously served from 1999-2013 in the House. She is the first openly gay Senator in US history ^[3]. She will be 56 years old in 2016.

One-term Republican Senator John Barrasso was elected with 75.7% of the vote in 2012. Barrasso was appointed to the seat in 2007, and won a special election in 2008. He will be 66 years old in 2018.