Agnéby-Tiassa should not be confused with Agnéby.
| Agnéby-Tiassa Region | |
| Native Name: | Région de l'Agnéby-Tiassa |
| Native Name Lang: | fr |
| Settlement Type: | Region |
| Subdivision Type: | Country |
| Subdivision Type1: | District |
| Subdivision Name1: | Lagunes |
| Established Title: | Established |
| Established Date: | 2011 |
| Seat Type: | Regional seat |
| Seat: | Agboville |
| Government Footnotes: | [1] |
| Leader Title: | Prefect |
| Leader Name: | Anatole-Privat Bako Digbe |
| Leader Title1: | Council President |
| Leader Name1: | Nando Martin M'Bolo |
| Unit Pref: | Metric |
| Area Footnotes: | [2] |
| Area Total Km2: | 8110 |
| Population Footnotes: | [3] |
| Population Total: | 865951 |
| Population As Of: | 2021 census |
| Population Density Km2: | auto |
| Timezone1: | GMT |
| Utc Offset1: | +0 |
Agnéby-Tiassa Region is one of the 31 regions of Ivory Coast. Since its establishment in 2011, it has been one of three regions in Lagunes District. The seat of the region is Agboville and the region's population in the 2021 census was 865,951.
Agnéby-Tiassa is currently divided into four departments: Agboville, Sikensi, Taabo, and Tiassalé.