The 2008 Washington Attorney General election was held on Tuesday, November 4, 2008, to elect the attorney general of Washington, concurrently with the 2008 U.S. presidential election, as well as elections to the U.S. Senate and various state and local elections, including for U.S. House and governor of Washington. Washington is one of two states that holds a top-two primary, meaning that all candidates are listed on the same ballot regardless of party affiliation, and the top two move on to the general election.
Incumbent Republican Attorney General Rob McKenna was re-elected to a second term in office, defeating Democratic challenger John Ladenburg in a landslide, winning by almost 20 points and carrying all but two counties. As of , this is the last time a Republican was elected Washington Attorney General. Along with the concurrent secretary of state election, this is also the last time King County voted Republican in a statewide election.
Counties that flipped from Democratic to Republican
McKenna won eight of nine congressional districts, including five that elected Democrats.