Cain Polk is a member of the wretched Polk family. He is a character in American Horror Story portrayed by Orson Chaplin (reenactment).
- Cain, like his father and brothers, is named after a biblical figure. His name is a reference to the brother and killer of Abel in the Book of Genesis.
- It is heavily implied in Chapter 8 of Roanoke, that Cain, and the rest of his siblings engage in an incestuous relationship with their mother. It is also hinted at when Mama Polk refers to her grandchildren as her "babies".
- The Polks seem to be based on the Peacock family from The X-Files episode, Home. Like the Peacocks, the Polks are murdering, deformed, inbred "hillbilly" characters dominated by a sexually abusive mother.