Sean Thomas Connaughton (born February 25, 1961) is an American attorney who was the Secretary of Transportation for the Commonwealth of Virginia from 2010 until 2014. He served as the Administrator of the United States Maritime Administration, an agency of the United States Department of Transportation, from 2006 until early 2009. Connaughton served as Chairman of the Prince William Board of County Supervisors from January 1, 2000 until his appointment as Maritime Administrator. He is also a lawyer, unsuccessful 2005 Republican candidate for Lieutenant Governor of Virginia, former United States Coast Guard officer, and a retired officer of the United States Naval Reserve. He was confirmed as Maritime Administrator by the Senate on August 3, 2006.