William Arthur Stewart Buxton OC (born March 10, 1949) is a Canadian computer scientist and designer.

[1] Buxton's scientific contributions include applying Fitts' law to human-computer interaction and the invention and analysis of the marking menu (together with Gordon Kurtenbach).

He pioneered multi-touch interfaces and music composition tools in the late 1970s, while working in the Dynamic Graphics Project at the University of Toronto.

[4] As of 2010, the Bill Buxton Award is handed out annually for the best doctoral dissertation in the field of HCI, completed at a Canadian university.

[5] In 2016, he was recognized for his lifelong work in human computer interaction design and received the Digifest Digital Pioneer Award.