Iro Lake (French: Lac Iro) is a cyclically occurring lake in the Moyen-Chari Region in southeastern Chad. It is fed in the summer and autumn months from the eastern arm of the Bahr Salamat, which forks seven kilometers southwest of the lake. The lake is about 100 kilometers north of the border with the Central African Republic. It is nearly circular, 13 kilometers long and 11 kilometers wide. During the dry season it can completely run dry.

Lake Iro
Sentinel-2 image (2021)
Lake Iro Location in Chad
Location	Moyen-Chari Region; Chad
Coordinates	10°06′N 19°25′E / 10.100°N 19.417°E / 10.100; 19.417
Primary inflows	Bahr Salamat
Primary outflows	evaporation
Basin countries	Chad
Max. length	13 km (8.1 mi)
Max. width	11 km (6.8 mi)
Surface area	110 km2 (42 sq mi)
Surface elevation	386 m (1,266 ft)
Islands	no
Settlements	Boum Kabir

It has been suspected that the depression is the remains of an impact crater.^[1][2]