Elena Gaussen (previously known as Elena Gaussen-Marks) is a London-based portrait painter. She was divorced from screenwriter and cryptographer Leo Marks in 2000. Gaussen produces portraits and landscapes in a variety of media including pencil sketches. She painted a portrait of Helene Hanff during Hanff's 1971 visit to London, as documented in Hanff's 1973 book The Duchess of Bloomsbury Street. Gaussen's Portrait of the Artist was included in the 1992 Annual Exhibition by the Royal Society of Portrait Painters. Gaussen illustrated a 1999 book release of Marks's famous poem The Life That I Have.