| Official Name: | Ouidah III |
| Pushpin Map Caption: | Location in Benin |
| Subdivision Type: | Country |
| Subdivision Name: |  Benin |
| Subdivision Type1: | Department |
| Subdivision Name1: | Atlantique Department |
| Subdivision Type2: | Commune |
| Subdivision Name2: | Ouidah |
| Unit Pref: | Imperial |
| Population As Of: | 2002 |
| Population Total: | 9880 |
| Timezone: | WAT |
| Utc Offset: | +1 |
Ouidah III is an arrondissement in the Atlantique Department of southern Benin. It is an administrative division under the jurisdiction of the commune of Ouidah. According to the population census conducted by the Institut National de la Statistique Benin on February 15, 2002, the arrondissement had a total population of 9,880.[1]