| Ivory Coast|
| Established as a second-level subdivision via a division of Bongouanou Dept|
Converted to a third-level subdivision
Transferred from N'Zi Region to new Moronou Region
Arrah Department is a department of Moronou Region in Lacs District, Ivory Coast. In 2014, its population was 80,345 and its seat is in the settlement of Arrah. The sub-prefectures of the department are Arrah, Kotobi, and Krégbé.
Arrah Department Wikipedia
Arrah Department was created in 2009 as a second-level division via a split-off from Bongouanou Department. At its creation, it was part of N'Zi-Comoé Region.
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, Arrah Department became part of N'Zi Region in Lacs District. In 2012, it was joined with two other departments to form the new Moronou Region.