Vivian "Sam" Chatmon (January 10, 1897 – February 2, 1983) was a Delta blues guitarist and singer who was a member of the Mississippi Sheiks.

[1] In an interview he stated that he started playing the guitar at the age of three, laying it flat on the floor and crawling under it.

He performed at parties and on street corners throughout Mississippi for small pay and tips.

While in California in 1970, he made several recordings with Sue Draheim, Kenny Hall, Ed Littlefield, Lou Curtiss, Kathy Hall, Will Scarlett and others at Sweet's Mill Music Camp, forming a group he called "The California Sheiks".

A headstone memorial to Chatmon with the inscription "Sitting on top of the World" was paid for by Bonnie Raitt through the Mt.