In English-speaking cultures, a Christmas elf is a diminutive elf that lives with Santa Claus at the North Pole and acts as his helper. Christmas elves are usually depicted as green- or red-clad, with large, pointy ears and wearing pointy hats. They are most often depicted as humanoids, but sometimes as furry mammals with tails. Santa's elves are often said to make the toys in Santa's workshop and take care of his reindeer, among other tasks.

An elf is a type of humanoid supernatural being in Germanic folklore. Elves appear especially in North Germanic mythology, being mentioned in the Icelandic Poetic Edda and Snorri Sturluson's Prose Edda.