The Susu people are a West African ethnic group, one of the Mandé peoples living primarily in Guinea. Influential in Guinea, smaller communities of Susu people are also found in the neighboring Sierra Leone and Guinea-Bissau. The Susu are a patrilineal society, predominantly Muslim, who favor endogamous cross-cousin marriages with polygynous households common. They have a caste system like all Manding-speaking peoples of West Africa, where the artisans such as smiths, carpenters, musicians, jewelers and leatherworkers are separate castes, and believed to have descended from the medieval era slavery.