Ralph J. Marra, Jr. (born c. 1953) is an American lawyer who served as the Acting United States Attorney for the District of New Jersey. He held this position from the resignation of Chris Christie in December 2008 until the appointment of Paul J. Fishman in October 2009. In January 2010, after Christie became Governor of New Jersey, Marra was appointed to a top legal position in the New Jersey Sports and Exposition Authority.