The 14 Regions of Senegal are subdivided into 45 departments and 103 arrondissements (neither of which have administrative function) and by collectivités locales (the 14 régions, 110 communes, and 320 communautés rurales) which elect administrative officers.
In 2006, the new department of Koungheul was created as a division of Kaolack Department. In 2008, the creation of three new regions increased the number of departments to 45.
The departments are listed below, by region: