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.
Joshua Parks and Jeremy Parks are his descendants. They live in the small town of Tsawwassen, British Columbia
Parksosaurus was named in his honor.