Tiassalé Department Département de Tiassalé
Department
Location in Ivory Coast. Tiassalé Department has had these boundaries since 2012.
Country	Ivory Coast
District	Lagunes
Region	Agnéby-Tiassa
1988	Established as a first-level subdivision via a division of Abidjan Dept
1997	Converted to a second-level subdivision
2011	Converted to a third-level subdivision
2012	Divided to create Taabo Dept
Departmental seat	Tiassalé
Government [1]
• Prefect	Jules Gouesse
Area
• Total	2,360 km2 (910 sq mi)
Population  (2021 census)[2]
• Total	278,954
• Density	120/km2 (310/sq mi)
Time zone	UTC+0 (GMT)

Tiassalé Department is a department of Agnéby-Tiassa Region in Lagunes District, Ivory Coast. In 2021, its population was 278,954 and its seat is the settlement of Tiassalé. The sub-prefectures of the department are Gbolouville, Morokro, N'Douci, and Tiassalé.

Tiassalé Department was created in 1988 as a first-level subdivision via a split-off from Abidjan Department.^[3]

In 1997, regions were introduced as new first-level subdivisions of Ivory Coast; as a result, all departments were converted into second-level subdivisions. Tiassalé Department was included in Lagunes 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, Tiassalé Department became part of Agnéby-Tiassa Region in Lagunes District.

In 2012, two sub-prefectures were split from Tiassalé Department to create Taabo Department.^[4]

5°54′N 4°50′W / 5.900°N 4.833°W / 5.900; -4.833

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