With Kouroussa town by far the largest in the Prefecture numbering only 10,000, the vast majority of the Prefecture's population live in small rural communities, making their living from subsistence and small scale cash crop agriculture, as well as small scale trade and mining. The majority of the population are members of the Malinke ethnic group or related Mande speakers. The eastern portion of the prefecture is formed from the Niger River valley, while most of the area characterized by low rolling hills and dry savanna grasslands or scrub-like forest.