Lunda Sul is a province of Angola. It has an area of 77,637 km² and a 2014 census population of 516,077. Saurimo is the capital of the province.
The Lunda Sul province is located in the extreme east of Angola, the capital of Saurimo located 946 kilometres (588 mi) by road east of the capital Luanda. It is bordered to the north by Lunda Norte Province, to the east by the Democratic Republic of the Congo, to the south by Moxico Province and southwest by Bie Province, and to the west by Malanje Province. Municipalities include Cacolo, Dala, Muconda, and Saurimo. The main road from Luanda to Lubumbashi traverses the province from west to east.
The province is dominated by dry savannah land; only in the only in the Kasai River valley are there remnants of tropical rainforest. The Kasai forms the eastern and southern frontier of Lunda Sul and is the main river of the province. The Kwango River is also a major river of the province. The climate of the province is predominantly tropical.