Koumpentoum department is one of the 46 departments of Senegal, located here, one of the four in the Tambacounda Region of east Senegal. It was created in 2008.

The department has two urban communes; Koumpentoum and Malem Niani.

The rest of the department is divided into two arrondissements, which are in turn divided into rural districts (communautés rurales):

• Bamba Thialène Arrondissement:
  • Ndame
  • Kahène
  • Bamba Thialène
• Kouthiaba Wolof Arrondissement:
  • Kouthia Gaydi
  • Kouthiaba Wolof
  • Pass Koto
  • Payar

13°59′N 14°34′W / 13.983°N 14.567°W / 13.983; -14.567