Pentagonia (disambiguation)

Pentagonia is a series of five novels by Cuban author Reinaldo Arenas

Pentagonia may also refer to:


 * Pentagonia (amoeba), a genus of amoeba in the order Arcellinida
 * Pentagonia (brachiopod), a genus of brachiopods in the family Meristellidae
 * Pentagonia (plant), a genus of plants in the family Rubiaceae