evidence: Biankouma Department is a department of Tonkpi Region in Montagnes District, Ivory Coast. In 2021, its population was 238,714 and its seat is the settlement of Biankouma. The sub-prefectures of the department are Biankouma, Blapleu, Gbangbégouiné, Gbonné, Gouiné, Kpata, and Santa. [...] The territory of Biankouma Department was unchanged until 2012, when two sub-prefectures were split-off to create Sipilou Department.[4] [...] - ^ Citypopulation.de Population of the regions and departments of Ivory Coast - ^ "Le décret n° 2012-611 du 04 juillet 2012 portant création des Départements de Djékanou, Sipilou, Kong, Gbéléban, Taabo, Kouassi-Kouassikro, Méagui, Séguélon, Buyo, M'Bengué, Facobly et Dianra" Archived 2016-12-21 at the Wayback Machine.