Chott Ech Chergui (Arabic: شط الشيرجوي) is a large endorheic salt lake in northwestern Algeria in the Saharan Atlas.
Lake has an area of about 2000 km² and is one of the largest lakes in Algeria; Ramsar site has an area of 8555 km².
Chott Ech Chergui is designated a Ramsar wetland of international importance.