The companions of Saint Nicholas are a group of closely related figures who accompany Saint Nicholas throughout the territories formerly in the Holy Roman Empire or the countries that it influenced culturally. These characters act as a foil to the benevolent Christmas gift-bringer, threatening to thrash or abduct disobedient children. Jacob Grimm associated this character with the pre-Christian house spirit which could be benevolent or malicious, but whose mischievous side was emphasized after Christianization. The association of the Christmas gift-bringer with elves has parallels in English and Scandinavian folklore, and is ultimately and remotely connected to the Christmas elf in modern American folklore.

Saint Nicholas is a legendary figure in European folklore based on the Greek early Christian bishop Nicholas of Myra, patron saint of children.