Geoffrey Biddle married Mary Ann Unger in 1980. Their daughter Eve was born in 1982. Among the pictures of his parents and his family in Granta 39: The Body are two taken by his daughter on pages 152 and 154. His books include Alphabet City, Sydney and Flora, and God Bless America. His work is in multiple collections, including the Museum of Modern Art. The Alphabet City photographs and papers were acquired by The New York Public Library in 2017.