Annaghanoon () is a rural townland in County Down, Northern Ireland. It has an area of 626.03 acres (2.53 km<sup>2</sup>). It is situated in the civil parish of Donaghcloney and the historic barony of Iveagh Lower, Upper Half, located 1 mile west of Donaghcloney. It lies within the Armagh City, Banbridge and Craigavon Borough Council.