James R Webb was a British painter specialising in marine views and landscapes. He lived all his life in Chelsea, London. He exhibited in London at the Royal Academy and the British Institute between 1850 and 1888, and many of his works still hang in London in the collections of the Victoria and Albert Museum and the Tate Gallery. Other works are found in a large number of provincial galleries. Webb was a pupil of Clarkson Frederick Stanfield. His father Archibald Webb and his brother Byron Webb were also noted painters.

He is buried on the east side of Highgate Cemetery.