Gnanmangui (also spelled Gnamandji) is a bakwé city in south-western Ivory Coast.

It is a sub-prefecture of Méagui Department in Nawa Region, Bas-Sassandra District.

The western third of the sub-prefecture is located in Taï National Park.

[2] In 2014, the population of the sub-prefecture of Gnanmangui was 116,476.

[3] The twenty five villages of the sub-prefecture of Gnanmangui and their population in 2014 are:[3] This Bas-Sassandra District location article is a stub.