Raja Sandow (1894-1943) (born as P.K. Nagalingam) was a Tamil film actor, film director and producer. He began his career as an actor in silent films and later became a prominent actor and director in Tamil and Hindi films of the 1930s. He is considered to be one of the pioneers of early Indian cinema.

Sandow was the first Tamil film director to adopt the practice of using names of actors in film titles. He was the first to introduce intimate kissing scenes and dancers in revealing costumes to the then conservative Tamil film industry. He was also the first director and producer to move Tamil cinema from remaking mythological stories and into making social themed films. He even advertised his films as "Don't miss to see your own picture". Sandow was also the first director to use Tamil literary works for film by directing Anadhai penn in 1931 based on Vai. Mu. Kothainayagi Ammal's novel of the same name.