Ossu is a town in Ossu Subdistrict, Viqueque District, East Timor. Located 622 meters (2,041 ft) above sea level it lies approximately 13 kilometres (8.1 mi) in a straight line north of the district capital of Viqueque and about 91 kilometres (57 mi) southeast of the capital Dili. Ossu is surrounded by several mountains: the Monte Mundo Perdido in the west, the Builo in the south, the Matebian massif in the east and the Fatu Laritame the north.