United States gubernatorial elections were held on November 4, 2008, in 11 states and two territories. Prior to the election, eight of the total seats were held by Democrats and five by Republicans. Two governors were prohibited by term limits from seeking re-election in 2008. The only governorship to change party was the open seat in Missouri, which was won by a Democrat after being previously held by a Republican.

The 2008 United States Senate elections were held on November 4, 2008, with 35 of the 100 seats in the Senate being contested. Thirty-three seats were up for regular elections; the winners were eligible to serve six-year terms from January 3, 2009, to January 3, 2015, as members of Class 2. There were also two special elections, the winners of those seats would finish the terms that ended on January 3, 2013. The presidential election, which was won by Democrat Barack Obama, elections for all House of Representatives seats; elections for several gubernatorial elections; and many state and local elections occurred on the same date.