Traffic in Souls (also released as While New York Sleeps) is a 1913 American silent crime drama film focusing on forced prostitution (white slavery) in the United States. Directed by George Loane Tucker and starring Jane Gail, Ethel Grandin, William H. Turner, and Matt Moore, Traffic in Souls is an early example of the narrative style in American films. The film consists of six reels, which was longer than most American films of the era.

A copy of Traffic in Souls is preserved at the Library of Congress and the Film Preservation Associates. In 2006, the film was added to the National Film Registry for preservation in the Library of Congress because it "presaged the Hollywood narrative film" and drew attention through its riveting depiction of the methods used to entrap young women into prostitution.