A central city is the primary urban area within a metropolitan region, often serving as the economic, cultural, and political hub. It typically features a dense population, a variety of businesses, and essential services such as schools and hospitals. Central cities are often characterized by their historical significance and diverse communities. Central cities are surrounded by suburban areas, which are residential regions that may rely on the central city for employment and amenities. Examples of central cities include New York City, Los Angeles, and Chicago. These cities often have well-developed public transportation systems to connect residents to surrounding areas.