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.

A central business district (CBD) is the commercial and business center of a city. It contains commercial space and offices, and in larger cities will often be described as a financial district. Geographically, it often coincides with the "city center" or "downtown". However, these concepts are not necessarily synonymous: many cities have a central business district located away from its commercial and/or cultural center and/or downtown/city center, and there may be multiple CBDs within a single urban area. The CBD will often be highly accessible and have a large variety and concentration of specialized goods and services compared to other parts of the city.