Joseph James Marzilli, Jr. (born May 8, 1958, in Stoneham, Massachusetts) was a member of the Massachusetts Senate. Marzilli, a Democrat, was elected to the Senate in a special election in December 2007, representing the communities of Arlington, Billerica, Burlington, Lexington and Woburn partway through his ninth term in the Massachusetts House of Representatives, representing Arlington and West Medford. He was the Senate Chair of the Committee on Tourism, Arts and Cultural Development. He also served on the Committees on Children and Families, Mental Health and Substance Abuse and Veterans' Affairs. He resigned from the chamber on November 14, 2008 after charges of sexual harassment.