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2010 U.S. Senate election results

Results of all 39 Senate races in 2010 (seats won: Republican 26, Democratic 13); 5 changed party. Winners, margins and every candidate.

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  • Republican 26
  • Democratic 13
Alabama: Richard C. Shelby REP +30.5Alaska: Lisa Murkowski W +4.0Arizona: John McCain REP +24.2Arkansas: John Boozman REP +21.0 gainCalifornia: Barbara Boxer DEM +10.0Colorado: Michael Bennet DEM +1.6Connecticut: Richard Blumenthal DEM +9.3Delaware: Christopher A. Coons DEM +16.6District of ColumbiaFlorida: Marco Rubio REP +19.2Georgia: Johnny Isakson REP +19.3Hawaii: Daniel K. Inouye DEM +53.2Idaho: Mike Crapo REP +46.3Illinois: Mark Kirk REP +1.6Indiana: Daniel Coats REP +14.6 gainIowa: Chuck Grassley REP +31.1Kansas: Jerry Moran REP +43.7Kentucky: Rand Paul REP +11.5Louisiana: David Vitter REP +18.9MaineMaryland: Barbara A. Mikulski DEM +26.4Massachusetts: Scott Brown REP +4.8 gainMichiganMinnesotaMississippiMissouri: Roy Blunt REP +13.6MontanaNebraskaNevada: Harry Reid DEM +5.7New Hampshire: Kelly Ayotte REP +23.2New JerseyNew MexicoNew York: Charles E. Schumer DEM +38.0North Carolina: Richard Burr REP +11.8North Dakota: John Hoeven REP +54.0 gainOhio: Rob Portman REP +17.4Oklahoma: Tom Coburn REP +44.5Oregon: Ron Wyden DEM +18.0Pennsylvania: Patrick J. Toomey REP +2.0Rhode IslandSouth Carolina: Jim DeMint REP +33.8South Dakota: John R. Thune REPTennesseeTexasUtah: Mike Lee REP +28.8Vermont: Patrick J. Leahy DEM +33.4VirginiaWashington: Patty Murray DEM +4.7West Virginia: Joe Manchin, III DEM +10.1Wisconsin: Ron Johnson REP +4.8 gainWyomingVermont: Patrick J. Leahy DEM +33.4New Hampshire: Kelly Ayotte REP +23.2Massachusetts: Scott Brown REP +4.8 gainRhode IslandConnecticut: Richard Blumenthal DEM +9.3New JerseyDelaware: Christopher A. Coons DEM +16.6Maryland: Barbara A. Mikulski DEM +26.4District of Columbia
States with a race in 2010, coloured by the winning party and shaded by margin. Grey: no race.

Seats that changed party

All races

StateSeatWinnerPartyMarginBefore
Alabama Class III Richard C. Shelby Republican 30.5 Republican
Alaska Class III Lisa Murkowski Republican 4.0 Republican
Arizona Class III John McCain Republican 24.2 Republican
Arkansas Class III John Boozman Republican 21.0 Democratic flip
California Class III Barbara Boxer Democratic 10.0 Democratic
Colorado Class III Michael Bennet Democratic 1.6 Democratic
Connecticut Class III Richard Blumenthal Democratic 9.3 Democratic
Delaware special Class II Christopher A. Coons Democratic 16.6 Vacant
Florida Class III Marco Rubio Republican 19.2 Republican
Georgia Class III Johnny Isakson Republican 19.3 Republican
Hawaii Class III Daniel K. Inouye Democratic 53.2 Democratic
Idaho Class III Mike Crapo Republican 46.3 Republican
Illinois Class III Mark Kirk Republican 1.6 Vacant
Illinois special Class III Mark Kirk Republican 1.6 Vacant
Indiana Class III Daniel Coats Republican 14.6 Democratic flip
Iowa Class III Chuck Grassley Republican 31.1 Republican
Kansas Class III Jerry Moran Republican 43.7 Republican
Kentucky Class III Rand Paul Republican 11.5 Republican
Louisiana Class III David Vitter Republican 18.9 Republican
Maryland Class III Barbara A. Mikulski Democratic 26.4 Democratic
Massachusetts special Class I Scott Brown Republican 4.8 Democratic flip
Missouri Class III Roy Blunt Republican 13.6 Republican
Nevada Class III Harry Reid Democratic 5.7 Democratic
New Hampshire Class III Kelly Ayotte Republican 23.2 Republican
New York Class III Charles E. Schumer Democratic 38.0 Democratic
New York special Class I Kirsten E. Gillibrand Democratic 31.5 Democratic
North Carolina Class III Richard Burr Republican 11.8 Republican
North Dakota Class III John Hoeven Republican 54.0 Democratic flip
Ohio Class III Rob Portman Republican 17.4 Republican
Oklahoma Class III Tom Coburn Republican 44.5 Republican
Oregon Class III Ron Wyden Democratic 18.0 Democratic
Pennsylvania Class III Patrick J. Toomey Republican 2.0 Republican
South Carolina Class III Jim DeMint Republican 33.8 Republican
South Dakota Class III John R. Thune Republican — Republican
Utah Class III Mike Lee Republican 28.8 Republican
Vermont Class III Patrick J. Leahy Democratic 33.4 Democratic
Washington Class III Patty Murray Democratic 4.7 Democratic
West Virginia special Class I Joe Manchin, III Democratic 10.1 Democratic
Wisconsin Class III Ron Johnson Republican 4.8 Democratic flip

Source: FiveThirtyEight election-results; each race page links the official source it was compiled from.