2010 Washington elections

Elections were held in Washington on Tuesday, November 2, 2010. Primary elections were held on August 17, 2010.

United States Senate
Incumbent Democratic Senator Patty Murray won re-election to her fourth term in office, defeating Republican challenger Dino Rossi by 5 points.

United States House
All of Washington's nine seats in the United States House of Representatives were up for election. All but one incumbent ran for re-election, with the exception being Brian Baird (D) of the 3rd District, who retired. Baird's seat was won by Jaime Herrera Beutler (R), while incumbents won re-election in all eight other seats.

State Supreme Court
Three positions on the Washington Supreme Court were up for election in 2010. James M. Johnson and Barbara Madsen won re-election uncontested, while Charles K. Wiggins defeated incumbent Richard B. Sanders by less than 1% of the vote.

Ballot measures
Nine statewide ballot measures were certified for the November 2, 2010 statewide ballot.

State Senate
Twenty-five of the forty-nine seats in the Washington State Senate were up for election. Despite early leads from several Republican challengers, Democrats ultimately retained control of the Senate, winning fifteen races.

State House of Representatives
All of the seats in the Washington House of Representatives were up for election in 2010. Republicans gained five seats in the election, leading to a spread of 56 Democrats and 42 Republicans in the State House.