Killinchy (from Irish: Cill Dhuinsí, meaning "Duinseach’s church") is a townland and small village in County Down, Northern Ireland. It is two miles inland from the western shores of Strangford Lough in the Borough of Ards. It is situated in the townland of the same name, the civil parish of Killinchy and the historic barony of Dufferin. It had a population of 539 people (205 households) in the 2011 Census.