| Official Name: | Monsey |
| Settlement Type: | Arrondissement and town |
| Pushpin Map: | Benin |
| Pushpin Map Caption: | Location in Benin |
| Subdivision Type: | Country |
| Subdivision Name: |  Benin |
| Subdivision Type1: | Department |
| Subdivision Name1: | Alibori Department |
| Subdivision Type2: | Commune |
| Subdivision Name2: | Karimama |
| Population As Of: | 2002 |
| Population Total: | 7,605 |
| Population Density Km2: | auto |
| Timezone: | WAT |
| Utc Offset: | +1 |
| Coordinates: | 12.2833°N 56°W |
Monsey is a town and arrondissement in the Alibori Department of northeastern Benin. It is an administrative division under the jurisdiction of the commune of Karimama. 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 7,605.[1]