The Tell Atlas (Arabic: الاطلس التلي, al-ʾaṭlas al-tlī) is a mountain chain over 1,500 km (932 mi) in length, belonging to the Atlas mountain ranges in North Africa, stretching mainly across northern Algeria, ending in north-eastern Morocco and north-western Tunisia.

The Algerian city Constantine with approximately 505,000 residents (2005) lies 80 km inland and directly in the mountains at 650 meters in elevation.

Agriculture includes grazing of sheep and goats on the grass in better-watered high plateau areas and some farming; dry-land barley is grown there.

The Tell Atlas has a typical Mediterranean climate, warm with dry summers and mild, rainy winters with snow at upper elevations.

[4] The Chiffa gorge is situated within the Tell Atlas; this location is one of the few remaining habitats for the endangered primate, the Barbary macaque, Macaca sylvanus.