Killinchy () is a civil parish in County Down, Northern Ireland. It is mainly situated in the historic barony of Dufferin, with two smaller portions in the baronies of Castlereagh Upper and Castlereagh Lower.
Settlements within Killinchy civil parish include:
Killinchy civil parish contains the following townlands: (Most of the townlands are in the barony of Dufferin, but 5 townlands are in the barony of Castlereagh Lower and 4 in the barony of Castlereagh Upper.)