In 2011, districts were introduced as new first-level subdivisions of Ivory Coast. At the same time, regions were reorganised and became second-level subdivisions and all departments were converted into third-level subdivisions. At this time, Guéyo Department became part of Nawa Region in Bas-Sassandra District.
^Décret n° 2008-96 du 5 mars 2008 portant création des départements de Bettié, Botro, Guéyo, Koro, Kouto, Ouangolodougou, Sinématiali, Tiapoum, Yakassé-Attobrou et Zoukougbeu.