
St. Denis (Saint-Denis) is the préfecture (administrative capital) of the French overseas région and overseas département of Réunion, in the Indian Ocean. It is located at the island's northernmost point, close to the mouth of the Rivière Saint-Denis.
Saint-Denis is the most populous commune in the French overseas departments. At the 1999 census, there were 158,139 inhabitants in the urban area of Saint-Denis, 131,557 of whom lived in the city of Saint-Denis proper and the remainder in the neighbouring commune of Sainte-Marie.
The closest airport is Roland Garros Airport which is also the main international airport of Réunion. The Réunion Tram Train, scheduled to start construction in 2008, will link the city to the airport and to Réunion's second city, Saint-Paul.