Aghnaleck () is a rural townland in County Down, Northern Ireland. It has an area of 673.3 acres (2.73 km<sup>2</sup>). It is situated in the civil parish of Annahilt and the historic barony of Iveagh Lower, Lower Half, located 4.5 miles south-east of Lisburn. It lies within the Lisburn and Castlereagh City Council.