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2008 U.S. Senate election results

Results of all 35 Senate races in 2008 (seats won: Democratic 20, Republican 15); 8 changed party. Winners, margins and every candidate.

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  • Democratic 20
  • Republican 15
Alabama: Jeff Sessions REP +26.8Alaska: Mark Begich DEM +1.2 gainArizonaArkansas: Mark L. Pryor DEM +59.1CaliforniaColorado: Mark Udall DEM +10.3 gainConnecticutDelaware: Joe Biden DEM +29.4District of ColumbiaFloridaGeorgia: Saxby Chambliss REP +14.9HawaiiIdaho: James E. Risch REP +23.6Illinois: Richard J. Durbin DEM +39.3IndianaIowa: Tom Harkin DEM +25.4Kansas: Pat Roberts REP +23.6Kentucky: Mitch McConnell REP +5.9Louisiana: Mary L. Landrieu DEM +6.4Maine: Susan M. Collins REP +22.8MarylandMassachusetts: John Kerry DEM +33.7Michigan: Carl Levin DEM +28.8Minnesota: Al Franken DEM +0.0 gainMississippi: Thad Cochran REP +22.9MissouriMontana: Max Baucus DEM +45.8Nebraska: Mike Johanns REP +17.5NevadaNew Hampshire: Jeanne Shaheen DEM +6.3 gainNew Jersey: Frank R. Lautenberg DEM +14.1New Mexico: Tom Udall DEM +22.7 gainNew YorkNorth Carolina: Kay R. Hagan DEM +8.5 gainNorth DakotaOhioOklahoma: James M. Inhofe REP +17.5Oregon: Jeff Merkley DEM +3.4 gainPennsylvaniaRhode Island: Jack Reed DEM +46.6South Carolina: Lindsey Graham REP +15.3South Dakota: Tim Johnson DEM +25.0Tennessee: Lamar Alexander REP +33.5Texas: John Cornyn REP +12.0UtahVermontVirginia: Mark R. Warner DEM +31.3 gainWashingtonWest Virginia: John D. Rockefeller, IV DEM +27.5WisconsinWyoming: Michael B. Enzi REP +51.4VermontNew Hampshire: Jeanne Shaheen DEM +6.3 gainMassachusetts: John Kerry DEM +33.7Rhode Island: Jack Reed DEM +46.6ConnecticutNew Jersey: Frank R. Lautenberg DEM +14.1Delaware: Joe Biden DEM +29.4MarylandDistrict of Columbia
States with a race in 2008, coloured by the winning party and shaded by margin. Grey: no race.

Seats that changed party

All races

StateSeatWinnerPartyMarginBefore
Alabama Class II Jeff Sessions Republican 26.8 Republican
Alaska Class II Mark Begich Democratic 1.2 Republican flip
Arkansas Class II Mark L. Pryor Democratic 59.1 Democratic
Colorado Class II Mark Udall Democratic 10.3 Republican flip
Delaware Class II Joe Biden Democratic 29.4 Democratic
Georgia Class II Saxby Chambliss (Runoff) Republican 14.9 Republican
Idaho Class II James E. Risch Republican 23.6 Republican
Illinois Class II Richard J. Durbin Democratic 39.3 Democratic
Iowa Class II Tom Harkin Democratic 25.4 Democratic
Kansas Class II Pat Roberts Republican 23.6 Republican
Kentucky Class II Mitch McConnell Republican 5.9 Republican
Louisiana Class II Mary L. Landrieu Democratic 6.4 Democratic
Maine Class II Susan M. Collins Republican 22.8 Republican
Massachusetts Class II John Kerry Democratic 33.7 Democratic
Michigan Class II Carl Levin Democratic 28.8 Democratic
Minnesota Class II Al Franken Democratic 0.0 Republican flip
Mississippi Class II Thad Cochran Republican 22.9 Republican
Mississippi special Class I Roger F. Wicker Republican 9.9 Republican
Montana Class II Max Baucus Democratic 45.8 Democratic
Nebraska Class II Mike Johanns Republican 17.5 Republican
New Hampshire Class II Jeanne Shaheen Democratic 6.3 Republican flip
New Jersey Class II Frank R. Lautenberg Democratic 14.1 Democratic
New Mexico Class II Tom Udall Democratic 22.7 Republican flip
North Carolina Class II Kay R. Hagan Democratic 8.5 Republican flip
Oklahoma Class II James M. Inhofe Republican 17.5 Republican
Oregon Class II Jeff Merkley Democratic 3.4 Republican flip
Rhode Island Class II Jack Reed Democratic 46.6 Democratic
South Carolina Class II Lindsey Graham Republican 15.3 Republican
South Dakota Class II Tim Johnson Democratic 25.0 Democratic
Tennessee Class II Lamar Alexander Republican 33.5 Republican
Texas Class II John Cornyn Republican 12.0 Republican
Virginia Class II Mark R. Warner Democratic 31.3 Republican flip
West Virginia Class II John D. Rockefeller, IV Democratic 27.5 Democratic
Wyoming Class II Michael B. Enzi Republican 51.4 Republican
Wyoming special Class I John Barrasso Republican 46.8 Republican

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