Koinadugu District is a district in the Northern Province of Sierra Leone. It is by far the largest District in Sierra Leone in geographical area. Its capital and largest city is Kabala, which is also one of the main cities in Northern Sierra Leone. The other major towns in the district include Sinkunia, Falaba, Fadugu and Kurubonla The District of Koinadugu had a population of 265,765 in the 2004 census, and has a total area of .