Kouassia-Niaguini (also spelled Kouassianiaguéné) is a town in the far east of Ivory Coast. It is a sub-prefecture of Transua Department in Gontougo Region, Zanzan District.

Kouassia-Nigaguini was a commune until March 2012, when it became one of 1,126 communes nationwide that were abolished."Le gouvernement ivoirien supprime 1126 communes, et maintient 197 pour renforcer sa politique de décentralisation en cours", news.abidjan.net, 7 March 2012.

In 2014, the population of the sub-prefecture of Kouassia-Niaguini was 16,872.

Villages The thirteen villages of the sub-prefecture of Kouassia-Niaguini and their population in 2014 are: Arrosua (1,983) Assuakô (1,523) Assuatifi (650) Baoulékoffikro (1,468) Dadiassé-Abrikokro (464) Essi-Kouakoukro (224) Kouadio-Dongokro (769) Kouadjo-Kissikro (793) Kouassi-Nianguini (1,738) Kroupikro (627) N'zuassé (2,810) Signahalé (2,047) Yao-Nango (1,776)

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