We have a few in Australia, although I don't know how many are in common circulation.

Residents of New South Wales are Cornstalks.
Cornstalks refer to residents of Victorians as Mexicans (because they are south of the New South Wales border).
Residents of Western Australia are Sandgropers.
Residents of Queensland are Banana Benders.
Residents of South Australia are Crow-eaters.
Residents of Tasmania are Apple Islanders.