Dagana is a town and urban commune situated in the Saint-Louis Region of Senegal and it is the capital of the Dagana Department. Dagana b…Dagana is a town and urban commune situated in the Saint-Louis Region of Senegal and it is the capital of the Dagana Department. Dagana borders Mauritania across the Senegal river. The different ethnic groups in Dagana include Wolof, Fula, and Moor.