William W. Warner (April 2, 1920 – April 18, 2008) was an American biologist and writer. He was awarded the 1977 Pulitzer Prize for General Nonfiction for his first book Beautiful Swimmers: Watermen, Crabs and the Chesapeake Bay, which was based on his experiences living and working among crab fishermen on the Chesapeake. Warner was a 1943 graduate of Princeton University. During World War II, Warner served in the Pacific Theater of operations as an aerial photograph analyst with a Marine air group.