Mr. St. Nick is a 2002 American Christmas fantasy comedy television film directed by Craig Zisk and written by Maryedith Burrell, Debra Frank, and Steve L. Hayes, based on a story by Burrell and Matthew Jacobs. It stars Kelsey Grammer as Nick St. Nicholas, the son of Santa Claus. Nick is living a lavish life in Miami, and is reluctant to take over the role of Santa Claus from his retiring father. Elaine Hendrix, Brian Bedford, Ana Ortiz, Wallace Shawn, Luis Esteban Garcia, Lupe Ontiveros, and Charles Durning also star.

Mr. St. Nick was produced by Hallmark Entertainment, and filmed in Vancouver, British Columbia, Canada. It premiered on ABC on November 17, 2002, as an episode of the Wonderful World of Disney anthology series.