Clare 'Tony' Atwood (11 May 1866 – 2 August 1962) was a British painter of portraits, still life, landscapes, interiors and decorative flower subjects. Atwood lived in a ménage à trois with the dramatist Christabel Marshall and the actress, theatre director, producer and costume designer Edith Craig from 1916 until Craig's death in 1947.

Atwood was born in 1866 at Richmond, London, the only daughter of Frederick Atwood, an architect, and his wife, Clara Becker. Named Clara at birth, she later used the form Clare and was also known as Tony. Atwood studied at Westminster School of Art and the Slade School of Fine Art.

Atwood first exhibited at the New English Art Club in 1893, becoming a member in 1912. She h...