The Vigilantes Are Coming is a 1936 American Republic film serial directed by Ray Taylor and Mack V. Wright. It was the third of the sixty six serials made by Republic Pictures.

Guinn Terrell Williams Jr. was an American actor who appeared in memorable westerns such as Dodge City (1939), Santa Fe Trail (1940), and The Comancheros (1961). He was nicknamed "Big Boy" as he was 6' 2" and had a muscular build from years of working on ranches and playing semi-pro and professional baseball, and at the height of his movie career was frequently billed above the title simply as Big Boy Williams or as "Big Boy" Guinn Williams on posters and in the film itself.