Ballyhay (from Irish: Baile Hae, meaning "Hay's townland")is a townland near Donaghadee in County Down, Northern Ireland. It is situated in the civil parish of Donaghadee and the historic barony of Ards Lower Ballyhay is a rural farming community with much land used for arable and pasture farming. There are records of a church flourishing in the area since the late 13th, early 14th century. There is transport available via the Number 7 bus (Moss road/Windmill road, Killaughey road) which travels from Millisle to Belfast via the Moss road.