Knocknamanagh is a Hewitt of 637 m in Kerry. It shares its height of 637 m with Causey Pike and Little Hart Crag.
On the Hewitts height ladder it sits between Causey Pike (637 m) and Little Hart Crag (637 m). Its nearest higher summit, Caoinkeen (692.8 m, 2.5 km south-east), is a listed top not profiled here. Its other name is Barrerneen.