Coordinates: 9°24′N 16°18′E / 9.400°N 16.300°E
Tandjilé is one of the 22 regions of Chad and its capital is Laï.
The region had 458,240 inhabitants in 1993, of whom 442,876 sedentary (rural, 385,537; urban, 57,339) and 15,364 nomad. In 2009 the total population was 682,817.
The main ethnico-linguistic groups are the Marba (19.85%), the Nangtchéré (13.62%), the Lélé (13.93%), the Ngambay (12.62%) and the Gabri (10.61%).
The region of Tandjilé is divided into two departments:
||Laï, Deressia, Dono Manga, Guidari, N'Dam
||Kélo, Baktchoro, Béré, Bologo, Dafra, Delbian, Dogou, Kolon