Derek Gregory (March 1, 1951) is an influential British geographer from the United Kingdom. He is currently professor of geography at the University of British Columbia in Vancouver, having previously worked at Cambridge University.

Gregory is best known for his book The Colonial Present:Afghanistan, Palestine and Iraq, published in 2004. This book discusses the actions of Israel, the United States of America and the United Kingdom in the Middle East after 9/11. It reflects how the popular discourses found in the media and in political circles indicates a continued Orientalism and colonialism. His writings are heavily influenced by the work of Edward Said. Gregory is said to be a post-modern geographer.

Earlier works by Gregory have concentrated on political, cultural and historical geography. He has also contributed to theoretical writing on Imagined geographies and David Harvey. A book published in 1994, Geographical Imaginations, reveals the cultural expressions which result from perceptions of place.