Tanaff Arrondissement is an arrondissement of the Sédhiou Department in the Sédhiou Region of Senegal. The arrondissement is divided administratively into
important settlements on its banks include Goudomp, Sedhiou, Diattakounda, Tanaff, and Kolda. The river is named after the Kasa Mansa, or king of the precolonial
Kolda Region. There are four communes in the department: Goudomp, Samine, Tanaff and Diattacounda. The rural districts (communautés rurales) comprise: Arrondissement