The lieutenant governor of Delaware is the second ranking executive officer of the U.S. state of Delaware. Lieutenant governors are elected for a term of four years in the same general election as the U.S. president and take office the following January.

Michael Newbold Castle is an American lawyer and politician who served as the 69th Governor of Delaware from 1985 to 1992 and as the U.S. representative from Delaware's at-large congressional district from 1993 to 2011. He is a member of the Republican Party.