Haley was raised Roman Catholic. He was a member of the Good Shepherd Parish and the Catholic Motion Picture Guild in Beverly Hills, California. He married Florence McFadden (1902–1996), a native of Wilkes Barre, Pennsylvania on February 25, 1921; they remained married until his death. Flo Haley opened a successful beauty shop and had many film personalities among her clients. The couple had a son, Jack Haley Jr. (1933–2001), who became a successful film Producer, and a daughter, Gloria (1923–2010). In 1974, the younger Haley married entertainer Liza Minnelli, the daughter of his father's Oz co-star Judy Garland. The marriage ended in divorce in 1979. Jack Haley Jr. died on April 21, 2001. Gloria Haley-Parnassus died on May 1, 2010. His nephew Bob Dornan served as a Republican congressman from California.