Bas-Sassandra District (French: District du Bas-Sassandra; [ba.sa.sɑ̃d.ʁa], "Lower Sassandra") is one of fourteen administrative districts of Ivory Coast.

The district is located in the southwest part of the country.

The district was created in a 2011 administrative reorganisation of the subdivisions of Ivory Coast.

[4] Its territory is composed of the former region of Bas-Sassandra with the addition of the department of Fresco, which was transferred from the region of Sud-Bandama.

[5] Bas-Sassandra District is currently subdivided into three regions and the following departments: According to the 2021 census, Bas-Sassandra District has a population of 2,687,176.