A lutin (French pronunciation: ​[lytɛ̃]) is a type of hobgoblin (an amusing goblin) in French folklore and fairy tales. Female lutins are called lutines (French pronunciation: ​[lytin]).

A lutin (varieties include the Nain Rouge or "red dwarf") plays a similar role in the folklore of Normandy to household spirits in England, Germany and Scandinavia. Lutin is generally translated into English as: brownie, elf, fairy, gnome, goblin, hobgoblin, imp, leprechaun, pixie, puck, or sprite. It sometimes takes the form of a horse saddled ready to ride, and in this shape is called Le Cheval Bayard. Lutins sometimes tangle people's or horses' hair into elf-locks.

A French fairy tale, "Le Prince Lutin", written in 1697 by Marie Catherine d'Aulnoy has a description of the "air, water and terrestrial lutin": "You are invisible when you like it; you cross in one moment the vast space of the universe; you rise without having wings; you go through the ground without dying; you penetrate the abysses of the sea without drowning; you enter everywhere, though the windows and the doors are closed; and, when you decide to, you can let yourself be seen in your natural form." In this story a red hat with two feathers makes the lutin invisible.

Lutins also assist Père Noël in Lapland.