Jack Lait (March 13, 1883 – April 1, 1954) was an American journalist, author and playwright. During a 50-year career he wrote prolifically and became renowned as one of the leading newspapermen of the first half of the 20th century. He is perhaps best known as co-author, with Lee Mortimer, of the controversial "Confidential" books, written in the late 1940s and early 1950s.