Santa Claus Is Comin' to Town is a 1970 American stop motion Christmas television special produced by Rankin/Bass Productions in New York, New York. The film is narrated by Fred Astaire and stars the voices of Mickey Rooney, Keenan Wynn, Robie Lester, Joan Gardner and Paul Frees, as well as an assistant song performance by the Westminster Children's Choir. The film tells the story of how Santa Claus and several Claus-related Christmas traditions came to be. It is based on the hit Christmas song, "Santa Claus Is Comin' to Town", which was written by J. Fred Coots and Haven Gillespie for Leo Feist, Inc. and introduced on radio by Eddie Cantor in 1934; and the story of Saint Nicholas.

Stop motion is an animated filmmaking technique in which objects are physically manipulated in small increments between individually photographed frames so that they will appear to exhibit independent motion or change when the series of frames is played back. Any kind of object can thus be animated, but puppets with movable joints or plasticine figures are most commonly used. Puppets, models or clay figures built around an armature are used in model animation. Stop motion with live actors is often referred to as pixilation. Stop motion of flat materials such as paper, fabrics or photographs is usually called cutout animation.