Julia A. Pierson, born 1959 or 1960 in Orlando, Florida, is an American law enforcement official and the Director of the United States Secret Service. Pierson was appointed by President Barack Obama and became the 23rd Director and the first woman to head the agency.

Before joining the United States Secret Service in 1983 as a Special Agent, Pierson served three years in the Orlando Police Department. She served in the Miami Field Office from 1983 to 1985, and the Orlando Field Office from 1985 to 1988. Pierson served as Deputy Assistant Director of the Office of Protective Operations from 2005 to 2006, Deputy Assistant Director of the Office of Administration from 2001 to 2005, and Special Agent in Charge of the Office of Protective Operations 2000 to 2001. She served on the presidential protective details of President's George H. W. Bush, Bill Clinton, and George W. Bush. From 2008 to her appointment as Director, Pierson served as the Chief of Staff and the Assistant Director of the Office of Human Resources and Training for the Secret Service.