Halloween Town is the primary setting of the film The Nightmare Before Christmas. Both the scenery and the characters are based on imagery commonly associated with Halloween, including skeletons, ghouls, monsters, black cats, etc. Every year on Halloween, the residents throw a big song and dance which ends with Jack Skellington emerging out of the town fountain. This is also the opening of the movie, as well as the song "This is Halloween". The inhabitants include Jack Skellington (the "Pumpkin King" in charge of yearly Halloween festivities), Sally the Ragdoll, Dr. Finkelstein, the Mayor, and Lock, Shock and Barrel. The town is one of seven holiday worlds seen in the film (with Christmas Town being the only other holiday world featured in the story) in a place called the Hinterlands.
Despite what humans think, apart from Oogie Boogie, Lock, Shock and Barrel, the inhabitants are not evil and only scare people, because that is their job to do so.
In the Kingdom Hearts series, Sora, Donald and Goofy use magic to turn into a vampire, mummy and patchwork person to blend in with the locals. However, their appearances alter upon going to Christmas Town.
Artwork of a Halloween Town room in Castle Oblivion