William Richard Keating is an American lawyer and politician serving as the U.S. representative for Massachusetts's 9th congressional district since 2013. A member of the Democratic Party, he first entered Congress in 2011, representing Massachusetts's 10th congressional district until redistricting. Keating's district currently includes Cape Cod and most of the South Coast. He raised his profile advocating for criminal justice issues in both houses of the Massachusetts General Court (1977–1999) before becoming district attorney of Norfolk County where he served three terms prior to his congressional tenure.