Asosa is a town in western Ethiopia and the capital of the Benishangul-Gumuz Region (or kilil) of Ethiopia. Located in the
Asosa Zone, this town has a latitude and longitude of , with an elevation of 1570 meters.
A Belgian force from the Congo captured Asosa 11 March 1941, destroying the Italian 10th Brigade and capturing 1,500 men.
During the Ethiopian Civil War, with help from the Eritrean People's Liberation Front (EPLF) the Oromo Liberation Front (OLF) captured Asosa from the Derg in early January 1990, and held the city for a brief time. During the occupation, In response the government airforce subjected Asosa to aerial attacks several times that month, killing 19 people and wounding 20.[ Before the OLF withdrew from Asosa, it destroyed the town's only electricity generator, stole 1.8 million Birr from the bank, most of which were deposits from the local farmer cooperatives, and took any valuable items its troops could carry.
During the 1990s Asosa was characterised by entire government office complexes of partially completed buildings, which John Young notes was "testimony to corrupt relations between politicians and contractors." Young continues, "Indicative of the scale of the problem, during a peace and development conference held in Assosa in June 1996, the then deputy prime minister, Tamrat Layne, dismissed the entire regional government and had many of its members imprisoned for corruption.
The governor of the town of Asosa, Ahmed Khalifa, on 7 July 2007 fled to Ad-Damazin, the capital of the Blue Nile State, in Sudan. Khalifa was accused by the Ethiopian authorities of offering concessions to Sudan on border issues. Sudan turned down a request to return Khalifa to Ethiopia, resulting in increased tensions between the two countries