Mayne (), is a civil parish in County Westmeath, Ireland. It is located about north of Mullingar.
Mayne is one of eight 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.