William R. Walling (June 2, 1872 – March 5, 1932) was an American actor of stage and film in the silent era.

Before he acted in films, Walling traveled the United States performing with stock theater companies.

[1] In 1912, he was a member of the stock company at the Alcazar Theatre in San Francisco, California.

He is known for his role as the railroad president in the 1926 film The Great K & A Train Robbery, which starred Tom Mix.

This article about a United States film actor born in the 1870s is a stub.