Benjamin B. Wagner is an American attorney who served as the United States Attorney for the Eastern District of California from 2009 to 2016. He was appointed in 2009 by President Barack Obama, replacing interim U.S. Attorney Lawrence G. Brown. As one of 93 U.S. Attorneys nationwide, he represented the United States in all civil and criminal cases within his district. He has since worked for Gibson Dunn Law Offices and serves on the Board of Trustees of Menlo College.