Greg Kahn (b. 1981) is an American documentary fine art photographer. Kahn grew up in a small coastal town in Rhode Island, and attended The George Washington University in Washington D.C. In August of 2012, Kahn co-founded GRAIN Images with his wife Lexey, and colleague Tristan Spinski.

Kahn's work concentrates on issues that shape personal and cultural identity. His Pulitzer Prize nominated project, “It’s Not a House, It’s a Home,” explores how the foreclosure crisis in Florida defined a new class of homelessness. His recent project in Cuba considers how governance molds individuality. And in Kahn's ongoing project 3 Millimeters, the quiet depletion of land is the catalyst for the evolution of the inhabitants’ identity.