Kono District is a district in the Eastern Province of Sierra Leone. Its capital and largest city is Koidu Town. Motema is the second most populous city in the district. The other major towns in the district include Yengema, Tombodu, Jaiama Nimikor and Sewafe. The district is the largest diamond producer in Sierra Leone. The population of Kono District is 505,767. Kono District borders Kenema District to the southwest, The Republic of Guinea to the east, Koinadugu District to the northeast and Kailahun District to the southeast. Kono District is divided into fourteen chiefdoms.
Kono District is one of the most ethnically diverse Districts in Sierra Leone and is home to a large population of many of Sierra Leone's ethnic groups, with no single ethnic group forming a majority.
Kono District population is religiously diverse among Muslims and Christians, though Muslims make up the majority of the population in Kono District