Douglas Neil Walton (born 1942) is a Canadian academic and author, known for his books and papers on argumentation, logical fallacies and informal logic.
He is presently Distinguished Research Fellow of the Centre for Research in Reasoning, Argumentation, and Rhetoric (CRRAR) at the University of Windsor, Ontario, Canada, and before that (2008–2014), he held the Assumption Chair of Argumentation Studies at the University of Windsor.
Walton's work has been used to better prepare legal arguments and to help develop artificial intelligence. A special issue of the journal Informal Logic surveyed Walton's contributions to informal logic and argumentation theory up to 2006.