 Casalsottano lies above a hill, between San Mauro Cilento (2 km north) and Mezzatorre (6.6 km south), the other municipal hamlet, by the Cilentan Coast.A ravine separates it from the village of Galdo, 5 km east.The village, part of the Cilento and Vallo di Diano National Park, is 8 km from Serramezzana, 9 from Pollica, 10.2 from Acciaroli, 10.6 from Agnone Cilento, 26 from Agropoli and 74 from Salerno.