| Dembeni | |
| Commune Status: | Commune |
| Map: | Locator map of Dembeni 2018.png |
| Map Caption: | Location of the commune (in red) within Mayotte |
| Canton: | Dembeni |
| Insee: | 97607 |
| Postal Code: | 97660 |
| Coordinates: | -12.8339°N 45.1725°W |
| Mayor: | Moudjibou Saïdi[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Dembeni-Mamoudzou |
| Area Km2: | 38.8 |
| Population: | 15848 |
| Population Date: | 2017 |
| Population Footnotes: | [2] |
Dembeni (pronounced as /fr/; also Dembéni) is a commune in the French overseas department of Mayotte, in the Indian Ocean.
Dembeni has a tropical savanna climate (Köppen climate classification Aw). The average annual temperature in Dembeni is . The average annual rainfall is with January as the wettest month. The temperatures are highest on average in March, at around, and lowest in August, at around . The highest temperature ever recorded in Dembeni was on 17 November 2011; the coldest temperature ever recorded was on 4 December 2002.
Demographic evolution of Dembeni