Ronald Joseph Mariano is an American politician currently serving as the Speaker of the Massachusetts House of Representatives. A Democrat from Quincy, he was first elected to the House in a December 1991 special election. He was appointed assistant majority leader in February 2009 and majority leader in January 2011 by then-speaker Robert DeLeo, who he succeeded as speaker upon DeLeo's retirement in 2020. He represents the 3rd Norfolk district.