Mayotte is the poorest department in France, mainland France and overseas territories included. Wealth per capita measured by gross domestic product is only 9,711 euros, compared to 34,100 for the national average, or 3.5 times less.
Yet the island of Mayotte is an Eldorado compared to its neighbor, the Comoros archipelago and its three islands. The gap in standard of living between the two territories belonging to distinct sovereign states is 13, calculated the geographer Stéphane Rosière.