Cayenne is the capital of French Guiana, an overseas région and département of France located in South America. The city stands on a former island at the mouth of the Cayenne River on the Atlantic coast. At the 1999 census, there were 66,149 inhabitants in the urban area of Cayenne (as defined by INSEE), 50,594 of whom lived in the city (commune) of Cayenne proper, and the remainder in the neighbouring commune of Remire-Montjoly. The commune of Matoury (18,032 inhabitants in 1999), where the Cayenne-Rochambeau Airport is located, is also a suburb of Cayenne, but it wasn't included in the official definition of the urban area by INSEE in 1999. Including Matoury, the whole conurbation had 84,181 inhabitants in 1999. By 2007 the area's population may have exceeded 100,000.