| Guéyo Department | |
| Native Name: | Département de Guéyo |
| Native Name Lang: | fr |
| Settlement Type: | Department |
| Subdivision Type: | Country |
| Subdivision Type1: | District |
| Subdivision Name1: | Bas-Sassandra |
| Subdivision Type2: | Region |
| Subdivision Name2: | Nawa |
| Seat Type: | Departmental seat |
| Seat: | Guéyo |
| Established Date: | Established as a second-level subdivision via division of Sassandra Dept |
| Established Title: | 2008 |
| Established Date1: | Converted to a third-level subdivision |
| Established Title1: | 2011 |
| Government Footnotes: | [1] |
| Leader Title: | Prefect |
| Leader Name: | Kouamé Réné Famy |
| Unit Pref: | Metric |
| Area Footnotes: | [2] |
| Area Total Km2: | 878 |
| Population Footnotes: | [3] |
| Population Total: | 102,213 |
| Population As Of: | 2021 |
| Population Density Km2: | auto |
| Timezone: | GMT |
| Utc Offset: | +0 |
Guéyo Department is a department of Nawa Region in Bas-Sassandra District, Ivory Coast. In 2021, its population was 102,213 and its seat is the settlement of Guéyo. The sub-prefectures of the department are Dabouyo and Guéyo.
Guéyo Department was created in 2008 as a second-level subdivision via a split-off from Sassandra Department.[4] At its creation, it was part of Bas-Sassandra 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, Guéyo Department became part of Nawa Region in Bas-Sassandra District.