Michael Newbold Castle was an American politician and lawyer who served as the U.S. representative for Delaware's at-large congressional district from 1993 to 2011. A member of the Republican Party, he previously served as the 69th governor of Delaware from 1985 to 1992, lieutenant governor from 1981 to 1985, and as a member of the Delaware General Assembly from 1967 to 1977. As of 2025, Castle is the most recent Republican to represent Delaware in the U.S. Congress and to have been elected governor of the state.
