Slieve Binnian is a Hewitt of 745.9 m in Newry, Mourne and Down. It overtops all four of its nearest neighbours; the tallest of them, Slieve Bearnagh, reaches 739 m.
Of the register hills in Newry, Mourne and Down, only Slieve Donard and Slieve Commedagh stand higher. All four of its nearest neighbours lie to the north, so it stands at the southern edge of its group. It shares its height of 745.9 m with Meall a' Mhuic.
