William J. Dyer (March 11, 1881 – December 22, 1933) was an American actor of the silent era.

He appeared in dozens of films, mostly Westerns and action films, between 1915 and 1933.

He was born in Atlanta, Georgia and died in Hollywood, California.

He was also credited as William Dyer and Bill Dyer.

This article about a United States film actor born in the 1880s is a stub.