Patagonia (Spanish pronunciation: [pataˈɣonja]) is a sparsely populated region at the southern end of South America, shared by Argentina and Chile. The region comprises the southern section of the Andes mountains and the deserts, pampas and grasslands to the east. Patagonia is one of the few regions with coasts on three oceans, with the Pacific Ocean to the west, the Atlantic Ocean to the east, and the Southern Ocean to the south.
The Colorado and Barrancas rivers, which run from the Andes to the Atlantic, are commonly considered the northern limit of Argentine Patagonia. The archipelago of Tierra del Fuego is sometimes included as part of Patagonia. Most geographers and historians locate the northern limit of Chilean Patagonia at Huincul Fault, in Araucanía Region.