Henry Fool is a 1997 American black comedy-drama film written, produced and directed by Hal Hartley, featuring Thomas Jay Ryan, James Urbaniak, and Parker Posey. Set like previous Hartley films in less affluent parts of Long Island, it recounts how the lives of a fatherless family are overturned by a mysterious outsider and how, as in The Unbelievable Truth, expectation and reality again conflict.

The film won the best screenplay award at the 1998 Cannes Film Festival. A sequel, titled Fay Grim, was released in 2006. Another sequel, titled Ned Rifle, was released in 2014.