Marina Bay is a bay located in the Central Area of Singapore, surrounded by the perimeter of four other planning areas, the Downtown Core, Marina East, Marina South and Straits View. The area surrounding the bay itself, also called Marina Bay, is a 360 hectare extension to the adjacent Central Business District. It is also the new downtown of Singapore, built on Singapore's reclaimed land.

The Central Area, also called the City Area, and informally The City, is the main commercial city centre of Singapore. Located in the south-eastern part of the Central Region, the Central Area consists of eleven constituent planning areas: the Downtown Core, Marina East, Marina South, the Museum Planning Area, Newton, Orchard, Outram, River Valley, Rochor, the Singapore River and Straits View, as defined by the Urban Redevelopment Authority. The term Central Business District (CBD) has also been used to describe most of the Central Area as well, although its boundaries lie within the Downtown Core.