Cecil Anthony John Coady, more commonly publishing as C. A. J. Coady and less formally known as Tony Coady (born 18 April 1936), is a prominent Australian philosopher with an international reputation for his research, particularly in epistemology but also in political and applied philosophy. Coady's best-known work relates to the epistemological problems posed by testimony, most fully expounded in his book Testimony: a Philosophical Study (Oxford University Press, 1990). It was influential in establishing a new branch of inquiry within the field of epistemology. He is also well known for his publications on issues related to political violence. Coady is a regular commentator in the Australian media on philosophical aspects of public affairs.