The municipality of Dembeni is located in the center of the island of Mayotte. It covers more than 38 km² and has 16,116 inhabitants. It is made up of 5 villages: Ongojou, Tsararano, Dembéni, Iloni and Hajangua. Dembeni is a university town focused on educating young people. Indeed, it not only has a high school and a college but it also houses the only University Center in Mayotte. Dembeni is the main archaeological site of Mayotte. Excavations have shown that the site had been, from the 8th to the 11th centuries, an important commercial center. It was thought until the 1980s that this prosperity was due to the iron trade. But from new research in 2013, it appears to be due to the rock crystal trade. The crystal arrived from the mines of Madagascar and was cut and resold in Dembeni, to Arab and Persian merchants. This rock crystal was then worked in Egypt and Persia.

The town is at the center of the eastern coast of Grande-Terre. The climate is tropical humid. The town is made up of five villages: Dembeni, Tsararano, Iloni, Hajangoua, Ongojou

Dembéni

The town's landscape, made up of plains, small cirques and hills, is characterized by its past as an agricultural center, dating from the colonial era. Location of large sugar cane plantations, there were in fact from 1841 to 0901 two agricultural concessions which marked its history. Today, the remains of the sugar factory and its tall chimneys in hajangoua bear witness to this past and are being revalued (as sites of interest for cultural tourism) by the cultural department of CDM.

Today, the town of Dembéni has retained its agricultural vocation, demonstrating significant potential. Its natural assets make it a privileged area for agriculture, in particular for market gardening. Citrus fruit production, of which Hajangoua's two farms are major suppliers, thus represents an important sector of the commune's economy. The town is also home to the IFM: the teacher training institute and a college.

Tsararano

Tsararano is a town and commune (Malagasy: kaominina) in Madagascar. It belongs to the district of Maevatanana, which is a part of Betsiboka Region. The population of the commune was estimated to be approximately 10,000 in 2001 commune census.

Primary and junior level secondary education are available in town. The majority 98% of the population of the commune are farmers. The most important crops are rice and tobacco, while other important agricultural products are peas and cotton. Additionally fishing employs 2% of the population

Iloni

Iloni is a French village located in the overseas department of Mayotte, a dozen kilometers from Mamoudzou.

The village is in the center of the eastern coast of Grande-Terre, it is part of the municipality of Dembéni. The climate is tropical humid.

Hajangoua

Hajangoua Cove is one of the bays in the Indian Ocean formed by the east coast of the main island of Mayotte, Grande-Terre. The Hajangoua Islands are islets of Mayotte administratively belonging to Pamandzi. These are deserted islands, protected by the Conservatoire du Littoral and they are part of the Mayotte Marine Natural Park. Located in Anse Hajangoua in the east of Mayotte, these are several islets and reefs, the main ones of which are: Kolo Issa, which stretches about 460 m in length and 120 m in width; Pengoua, which stretches about 660 m in length and less than 70 m in width; Pouhou, which extends over approximately 300 m in length and 30 m in width.

Ongojou

Ongojou is a village in the commune of Dembéni on Mayotte. It is known for its rich history of wine making.