Rodney Earl Slater is an American politician of the Democratic Party who served as the United States Secretary of Transportation under President Bill Clinton from 1997 to 2001. Prior to being appointed to the Clinton Cabinet, Slater served as the administrator of the Federal Highway Administration from 1993 to 1997.

The United States secretary of transportation is the head of the United States Department of Transportation. The secretary serves as the principal advisor to the President of the United States on all matters relating to transportation. The secretary is a statutory member of the Cabinet of the United States, and is fourteenth in the presidential line of succession.