Downtown is a term primarily used in North America by English speakers to refer to a city's sometimes commercial, cultural and often the historical, political, and geographic heart. It is often synonymous with its central business district (CBD). Downtowns typically contain a small percentage of a city's employment. Sometimes, smaller downtowns are surrounded by lower population densities and lower incomes than suburbs. It is often distinguished as a hub of public transit and culture.

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.