William Arthur Parks (11 December 1868 – 3 October 1936) was a Canadian geologist and paleontologist, following in the tradition of Lawrence Lambe.
Parks was born in Hamilton, Ontario. After graduating with a Bachelor of Arts in 1892, Parks joined the University of Toronto's staff, where he taught geology, paleontology, and mineralogy. He went on to earn a PhD in 1900. Parks died in Toronto, Ontario, in 1936.
Parksosaurus was named in his honor.