Born in Beirut, Hage grew up in Lebanon and Cyprus. He moved to New York City in 1982, and after studying at the New York Institute of Photography, relocated to Montreal in 1991, where he studied arts at Dawson College and Concordia University. He subsequently began exhibiting as a photographer, and has had works acquired by the Canadian Museum of Civilization and the Musée de la civilisation de Québec.
Hage has published journalism and fiction in several Canadian magazines. His debut novel, De Niro's Game (2006), won the 2008 IMPAC Dublin Literary Award and was shortlisted for the 2006 Scotiabank Giller Prize and the 2006 Governor General's Award for English fiction. He was also awarded two Quebec awards, the Hugh MacLennan Prize for Fiction and the McAuslan First Book Prize at the Quebec Writers' Federation literary awards.