Senegal River
They are found primarily in the northern regions of Senegal where they constitute 15% of the population. This region is irrigated by the Senegal River valley, overlaps southern Mauritania. During the colonial era, and in the modern times, some of the Toucouleurs resettled in western Mali. They are about a million Toucouleur people in Senegal River valley area, and about 100,000 in Mali.