William Anthony Paddon, OC (July 10, 1914 – January 5, 1995) was a Canadian surgeon and the seventh lieutenant governor of Newfoundland from 1981 to 1986.

Born in Indian Harbour, Labrador, Newfoundland, the son of Dr. Harry Locke Paddon (1881-1939) and Mina Gilchrist, a physician and a nurse, respectively, with the International Grenfell Association.

He received a Bachelor of Science in 1936 from Trinity College in Hartford, Connecticut.

During World War II, he served with the Royal Canadian Navy as a surgeon.

After the war, he returned to Labrador with the International Grenfell Association, serving as physician at the North West River hospital.