The "umbrella man", identified by the United States House Select Committee on Assassinations in 1978 as Louie Steven Witt, is a name given to a figure who appears in the Zapruder film, and several other films and photographs, near the Stemmons Freeway sign within Dealey Plaza during the assassination of John F. Kennedy.

Witt is the subject of a 2011 documentary short, The Umbrella Man, by Errol Morris for The New York Times.

This person has been the object of much speculation, as he was the only person seen carrying, and opening, an umbrella on that sunny day. He was also one of the closest bystanders to President John F. Kennedy when Kennedy was first struck by a bullet.

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