Annadorn () is a rural townland in County Down, Northern Ireland. It has an area of 644.94 acres (2.61 km2). It is situated in the civil parish of Loughinisland and the historic barony of Kinelarty, located 3 miles west of Downpatrick. It lies within the Newry, Mourne and Down District Council.

See also List of townlands in County Down

References