Ballinalack is a village and a townland in County Westmeath, Ireland. It is located about north–west of Mullingar.
Ballinalack is one of 15 townlands of the civil parish of Leny in the barony of Corkaree in the Province of Leinster. The townland covers . The River Inny meanders past forming the western boundary of the townland. The neighbouring townlands are: Cappagh to the north, Carrick and Grange to the east, Cullenhugh and Glebe to the south and Joanstown to the west.
In the 1911 census of Ireland there were 24 houses and 105 inhabitants in the townland, mostly centred in the village.