Graham Robert Oppy (born 1960) is an Australian philosopher whose main area of research is the philosophy of religion.

[4] Oppy is considered by some philosophers (including William Lane Craig and Edward Feser) to be the most formidable defender of atheism living today.

[5] Graham Oppy was born in Benalla on 6 October 1960 to a Methodist family, but he ceased to be a religious believer as a young teenager[6] and is now an atheist.

[8] He attended Melbourne University from 1979, where he completed two degrees: a BA (honours) in philosophy and a BSc in mathematics.

In 1987, he started graduate work at Princeton University under the supervision of Gilbert Harman on questions in the philosophy of language.