Matthew Christopher Deis (born December 13, 1983) is an American bass guitarist.
Originally from Peterborough, New Hampshire, he is best known as the bassist of CKY with whom he performed with between 2005 and 2010, returning in 2015 and departing again in 2019, and the former bassist of metalcore band All That Remains, with whom he performed between 2003 and 2005.