page_title: Megalopolis
section_title: United States
hierarchical_section_title: Megalopolis / North America / United States
caption_attribution_description: English: Manhattan
context_page_description: A megalopolis, sometimes called a megapolis; also megaregion, city cluster or supercity, is typically defined as a group of two or more roughly adjacent metropolitan areas, which may be somewhat separated or may merge into a continuous urban region. The megalopolis concept became highly influential as it introduced a new, larger scale in thinking about urban patterns and urban growth.
context_section_description: Constituent urban areas of each megalopolis are based on reckoning by a single American organization, the Regional Plan Association (RPA). The RPA definition of the Great Lakes Megalopolis includes some Canadian metropolitan areas with the United States including some but not all major urban centres in the Windsor-Quebec City Corridor. Note that one city, Houston, is listed in two different Megalopolis regions as defined by the RPA, (the Gulf Coast and Texas Triangle).
caption: Midtown Manhattan facing toward Lower Manhattan, New York City, in the Northeast megalopolis
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