2006 United States elections

Elections were held in the United States on November 7, 2006, in the middle of Republican President George W. Bush's second term against the backdrop of the war on terror. In a political revolution that ended more than a decade of Republican rule, the Democratic Party was swept into majorities of both chambers of Congress, governorships, and state legislatures. These elections were widely categorized as a Democratic wave.

In the Senate, Democrats won a net gain of six seats to secure a narrow majority in that chamber. Democrats also gained 31 seats in the House of Representatives, and following the election, Nancy Pelosi became the first female speaker of the House. In the gubernatorial elections, Democrats achieved a net gain of six seats. Nationwide, Republicans failed to win any congressional or gubernatorial seat that was held by a Democrat before the election. This is the first midterm election since 1954 in which the Democrats ended unified Republican control of Congress in a midterm election under a Republican president. This was also the first time since 1994 where a party did not lose a single incumbent in a gubernatorial or congressional election. Additionally, this is the last midterm election in which both chambers of Congress flipped to the same party simultaneously.