Epirus (Greek: Ήπειρος, Ípiros), is a periphery in northwestern Greece. It borders the peripheries of West Macedonia and Thessaly to the east, Stereá Elláda (Central Greece) to the south, the Ionian Sea and the Ionian Islands to the west and Albania to the north. The province has an area of about 9,200 km² (3,551 square miles).

Greek Epirus, like the region as a whole, is rugged and mountainous. It is largely made up of mountainous ridges, part of the Dinaric Alps. The periphery's highest spot is on Mount Smolikas, at an altitude of 2.637 metres above sea level. In the east, the Pindus Mountains that form the spine of mainland Greece separate Epirus from Macedonia and Thessaly. Most of Epirus lies on the windward side of the Pindus. The winds from the Ionian Sea offer the region more rainfall than any other part of Greece.

The Vikos-Aoos and Pindus National Parks are situated in the Ioannina Prefecture of the periphery. Both areas have imposing landscapes of dazzling beauty as well as a wide range of fauna and flora.

The climate of Epirus is mainly alpine. The vegetation is made up mainly of coniferous species. The animal life is especially rich in this area and includes, among other species, bears, wolves, foxes, deer and lynxes.