Dino John Rossi (born October 15, 1959) is an American businessman and politician who served as a Washington State Senator thrice, from 1997 to 2003, in 2012, and again from 2016 to 2017. A Republican, he is a former Chair of the Washington State Special Olympics. Rossi returned to the Washington State Senate, being appointed in 2012 and again from 2016 to 2017. He was a candidate for the United States House of Representatives for the eighth congressional district in 2018. Rossi lost that race to Democrat Kim Schrier.