Mayne (), is a civil parish in County Westmeath, Ireland. It is located about north of Mullingar.
Mayne is one of 8 civil parishes in the barony of Fore in the Province of Leinster. The civil parish covers .
Mayne civil parish comprises the village of Coole and 19 townlands: Ballinealoe, Carn, Clonteens, Coole (townland), Coolure Demesne, Derrya, Fearmore, Lickny, Lispopple, Mayne, Monktown, Newtown, Nonsuch, Packenhamhall or Tullynally, Portjack, Shrubbywood, Simonstown, Tullynally or Pakenhamhall, Turbotstown, Williamstown.
The neighbouring civil parishes are: Lickbla to the north, Rathgarve to the east, Faughalstown to the south and Street to the west.