Ronald Mariano (born October 31, 1946) is the majority leader 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 became majority leader in January 2011. He represents the 3rd Norfolk district.
Mariano was born and raised in Quincy, where he attended public school. He received his B.S. from Northeastern University in Boston and his M.Ed. from the University of Massachusetts Boston. He became a teacher and was elected to the Quincy School Committee, where he served from 1989 to 2009. He also served on the Ward 2 Democratic Committee, the Norfolk County Advisory Board, and the Quincy College Board of Governors.