Christopher J. Marr (born August 20, 1954) was a state senator from Spokane, Washington, representing Washington's 6th Legislative District in the Washington State Legislature in Olympia. He was defeated in the November 2010 general election by Michael Baumgartner, after one term in office. The election battle between Marr and Baumgartner was considered the most expensive legislative race in Washington State history. Marr's term effectively ended in January, 2011.