An Sithean is a Corbett of 814 m in Highland. All four of its nearest neighbours are higher, up to Sgurr Fhuar-thuill at 1,049.2 m.
It sits below Maoile Lunndaidh, only 3.6 km to the west and 190.9 m higher. It shares its height of 814 m with Corserine. On the Corbetts height ladder it sits between Corserine (814 m) and Sgor Mor (813.8 m). The higher hill nearest to it, Maoile Lunndaidh, is a Munro, 3.6 km to the west. Its other name is An Sidhean.