Fontvieille is the newest of the four traditional quarters (districts) in the principality of Monaco, and one of ten Wards for modern administrative purposes. It is located in the western part of Monaco. New plans exist to extend Fontvieille, due to Monaco's growing economy and population.

In contrast to the other city districts Monaco-Ville, Monte Carlo and La Condamine, Fontvieille was constructed, after Italian architect Manfredi Nicoletti's design, almost entirely on artificially reclaimed land and thus represents one of the younger parts of the principality. In order to combat the chronic land shortage in the extremely densely populated principality, the work was begun in 1966 to create new land in the Mediterranean Sea southwest of le rocher. In 1981, the then Crown Prince Albert (since April 6, 2005 Albert II, Prince of Monaco) laid the cornerstone for the new city quarter.

The existence of Fontvieille, and its many public works projects, relates substantially to former Prince of Monaco, Prince Rainier III's reputation as the Builder Prince.

Monaco ⁱ/ˈmɒnəkoʊ/, officially the Principality of Monaco (French: Principauté de Monaco; Monégasque: Principatu de Múnegu; Italian: Principato di Monaco; Occitan: Principat de Mónegue), is a sovereign city state, located on the French Riviera in Western Europe. Bordered by France on three sides, with one side bordering the Mediterranean Sea, its center is about 16 km (9.9 mi) from Italy, and is only 15 km (9.3 mi) north east of Nice, France. It has an area of 1.98 km² (0.76 sq mi), and a population of 35,986, making Monaco the second smallest and the most densely populated country in the world. Monaco has a land border of only 4.4 km (2.7 mi), a coastline of 4.1 km (2.5 mi), and a width that varies between 1.7 km (1.1 mi) and 349 metres (382 yards). The highest point in the country is a narrow pathway named Chemin des Révoires on the slopes of Mont Agel, in the Les Révoires district, which is 161 metres (528 feet) above sea level. Monaco's most populated Quartier is Monte Carlo, and the most populated Ward is Larvotto/Bas Moulins. After a recent expansion of Port Hercules, Monaco's total area is 2.05 km² (0.79 sq mi), with new plans to extend the district of Fontvieille, with land reclaimed from the Mediterranean Sea.