Balloo is a small village and townland near Killinchy in County Down, Northern Ireland. It is 5 miles south of Comber on the A22 road between Belfast and Downpatrick. It is situated in the townland of the same name, the civil parish of Killinchy and the historic barony of Dufferin. It lies within the Ards and North Down Borough. It had a population of 189 people in the 2011 Census.