Palmas Arborea (Sardinian: Prammas) is a comune (municipality) in the Province of Oristano in the Italian region Sardinia, located about 80 kilometres (50 mi) northwest of Cagliari and about 6 kilometres (4 mi) southeast of Oristano. As of 31 December 2004, it had a population of 1,366 and an area of 39.3 square kilometres (15.2 mi²).

Palmas Arborea borders the following municipalities: Ales, Oristano, Pau, Santa Giusta, Villa Verde, Villaurbana.