Guy Clarence Vanderhaeghe (born April 5, 1951) is a Canadian fiction author from Esterhazy, Saskatchewan. He is the author of four novels, My Present Age (1984), Homesick (1989), The Englishman's Boy (1996) and The Last Crossing (2001). The Last Crossing is a long-time national bestseller and winner of the Saskatoon Book Award, the Saskatchewan Book Awards for Fiction and for Book of the Year, and the Canadian Booksellers Association Libris Award for Fiction Book of the Year. He is also the author of three collections of short stories, Man Descending (1982), winner of the Governor General's Award and the Faber Prize in the U.K., The Trouble With Heroes (1983), and Things As They Are? (1992).

In 2003, he was awarded the Saskatchewan Order of Merit.

The 2004 edition of Canada Reads selected Vanderhaeghe's The Last Crossing as the book that should be read by all Canadians.

Guy Vanderhaeghe lives with his wife in Saskatoon, where he is a Visiting Professor of English at St. Thomas More College at The University of Saskatchewan. He has won the Governor General's Award for two of his works: Man Descending and The Englishman's Boy.