| Tiébissou Department | |
| Native Name: | Département de Tiébissou |
| Native Name Lang: | fr |
| Settlement Type: | Department |
| Subdivision Type: | Country |
| Subdivision Type1: | District |
| Subdivision Name1: | Lacs |
| Subdivision Type2: | Region |
| Subdivision Name2: | Bélier |
| Seat Type: | Departmental seat |
| Seat: | Tiébissou |
| Established Title: | 1998 |
| Established Date: | Established as a second-level subdivision via a division of Yamoussoukro Dept |
| Established Title1: | 2005 |
| Established Date1: | Divided to create Didiévi Dept |
| Established Title2: | 2011 |
| Established Date2: | Converted to a third-level subdivision |
| Government Footnotes: | [1] |
| Leader Title: | Prefect |
| Leader Name: | Pascal Kifory Ouattara |
| Unit Pref: | Metric |
| Area Total Km2: | 2480 |
| Population Total: | 116321 |
| Population Footnotes: | [2] |
| Population As Of: | 2021 census |
| Population Density Km2: | auto |
| Timezone: | GMT |
| Utc Offset: | +0 |
Tiébissou Department is a department of Bélier Region in Lacs District, Ivory Coast. In 2021, its population was 116,321 and its seat is the settlement of Tiébissou. The sub-prefectures of the department are Lomokankro, Molonou, Tiébissou, and Yakpabo-Sakassou.
Tiébissou Department was created in 1998 as a second-level subdivision via a split-off from Yamoussoukro Department.[3] At its creation, it was part of Lacs Region.
In 2005, Tiébissou Department was divided in order to create Didiévi Department.[3]
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, Tiébissou Department became part of Bélier Region in Lacs District.