Willis Elphinstone Davis Jr. (1893–1936) was an American tennis player who was active in the early 20th century.

Willis Elphinstone Davis was an American landscape painter known for the high prices his works commanded, and for his leadership of the Bohemian Club, the Mark Hopkins Institute of Art and the San Francisco Art Association. He made a career as a contractor in electrical engineering before he started painting, and he was also interested in commerce, serving as director of several firms.