William A. Foley (William Auguste "Bill" Foley; born 1949) is an American linguist and professor at the University of Sydney. He specialises in Papuan and Austronesian languages. He is perhaps best known for his 1986 book The Papuan Languages of New Guinea, his 1991 grammar of Yimas, and his partnership with Robert Van Valin in the development of Role and Reference Grammar.
- William A. Foley and Robert D. Van Valin, Jr (1984). Functional syntax and universal grammar. Cambridge: Cambridge University Press.
- William A. Foley (1986). The Papuan Languages of New Guinea. Cambridge: Cambridge University Press. ISBN 0-521-28621-2. Google Books
- William A. Foley (1991). The Yimas Language of New Guinea. Stanford: Stanford University Press. ISBN 0-8047-1582-3
- William A. Foley (1997). Anthropological Linguistics: an introduction. Oxford: Basil Blackwell.
- William A. Foley (2005). "Linguistic prehistory in the Sepik - Ramu basin." In: Andrew Pawley, Robert Attenborough, Robin Hide and Jack Golson, eds, Papuan pasts: cultural, linguistic and biological histories of Papuan-speaking peoples, 109-144. Canberra: Pacific Linguistics.