William Foley may refer to:
- William Foley (American football), former American football coach
- William Foley (artist) (1926–2020), American artist
- William Foley (bishop) (1931–1991), Australian bishop and Archbishop
- William Foley (cricketer) (1906–1963), South African cricketer
- William A. Foley (born 1949), American linguist
- William Brown Foley (1855–1916), baseball player
- William R. Foley (1908–1988), American politician
- Bill Foley, American photojournalist
- William P. Foley II (born 1944), American businessman; chairman of Fidelity National Financial and owner of the Vegas Golden Knights
- Brian Foley (hymnist) (William Brian Foley, 1919–2000), Roman Catholic priest and hymnodist
- William J. Foley (1887–1952), American attorney and politician
- William Foley (priest) (1854–1944), Archdeacon of Ardfert
- Will Foley (footballer) (born 1960), Scottish footballer