Duncan James Corrowr Grant (1885-1978) was a Scottish painter, a member of the Bloomsbury group.

He was born in Rothiemurchus near Inverness and studied art at the Slade School and in Italy and Paris. He was a homosexual but also the lover of Vanessa Bell, who left her husband to live with him at Charleston near Firle in Sussex. He and Vanessa painted in the house at Charleston and decorated the house itself with their paint. He worked with, and was influenced by, another member of the group, Roger Fry. As well as painting landscapes and portraits, he was a designer of textiles and ceramics.