Chicago, officially the City of Chicago, is the most populous city in the U.S. state of Illinois, and the third-most populous city in the United States, following New York City and Los Angeles. With a population of 2,746,388 in the 2020 census, it is also the most populous city in the Midwestern United States and the fifth most populous city in North America. Chicago is the county seat of Cook County, the second most populous county in the U.S., while a small portion of the city's O'Hare Airport also extends into DuPage County. Chicago is the principal city of the Chicago metropolitan area, defined as either the U.S. Census Bureau's metropolitan statistical area or the combined statistical area, often called Chicagoland. It is one of the 40 largest urban areas in the world.
Frankfurt, officially Frankfurt am Main, is the most populous city in the German state of Hesse. Its 763,380 inhabitants as of 31 December 2019 make it the fifth-most populous city in Germany. On the river Main, it forms a continuous conurbation with the neighboring city of Offenbach am Main and its urban area has a population of 2.3 million. The city is the heart of the larger Rhine-Main metropolitan region, which has a population of 5.5 million and is Germany's second-largest metropolitan region after the Rhine-Ruhr region. Frankfurt's central business district lies about 90 km (56 mi) northwest of the geographic center of the EU at Gadheim, Lower Franconia. Like France and Franconia, the city is named after the Franks. Frankfurt is the largest city in the Rhine Franconian dialect area.
London is the capital and largest city of England and the United Kingdom. It stands on the River Thames in south-east England at the head of a 50-mile (80 km) estuary down to the North Sea, and has been a major settlement for two millennia. The City of London, its ancient core and financial centre, was founded by the Romans as Londinium and retains boundaries close to its medieval ones. Since the 19th century, "London" has also referred to the metropolis around this core, historically split between the counties of Middlesex, Essex, Surrey, Kent, and Hertfordshire, which largely comprises Greater London, governed by the Greater London Authority. The City of Westminster, to the west of the City of London, has for centuries held the national government and parliament.
Los Angeles, often referred to by its initials L.A., is the largest city in California. With a 2020 population of 3,898,747, it is the second-largest city in the United States, following New York City. Los Angeles is known for its Mediterranean climate, ethnic and cultural diversity, Hollywood film industry and sprawling metropolitan area.
Dallas is a city in the U.S. state of Texas and the largest city in and seat of Dallas County, with portions extending into Collin, Denton, Kaufman and Rockwall counties. With a 2020 census population of 1,304,379, it is the ninth most-populous city in the U.S. and the third-largest in Texas after Houston and San Antonio. Located in North Texas, the city of Dallas is the main core of the largest metropolitan area in the Southern United States and the largest inland metropolitan area in the U.S. that lacks any navigable link to the sea. It is the most populous city in the Dallas–Fort Worth metroplex, the fourth-largest metropolitan area in the country at 7.5 million people.
Miami, officially the City of Miami, is a coastal metropolis located in Miami-Dade County in southeastern Florida. With a population of 467,963 as of the 2020 census, it is the 44th-largest city in the United States and the core of the nation's eighth-largest metropolitan area. The city has the third-largest skyline in the U.S. with over 300 high-rises, 58 of which exceed 491 ft (150 m).
Charlotte is the most populous city in the U.S. state of North Carolina. Located in the Piedmont region, it is the county seat of Mecklenburg County. The population was 874,579 as of the 2020 census, making it the 16th-most populous city in the U.S., the second-largest city in the Southeast behind Jacksonville, Florida, and seventh-largest city in the Southern United States. The city is the cultural, economic, and transportation center of the Charlotte metropolitan area, whose population ranks 23rd in the U.S., and had a population of 2,660,329, in 2020. The Charlotte metropolitan area is part of a sixteen-county market region or combined statistical area with a 2020 census-estimated population of 2,846,550.
A central business district (CBD) is the commercial and business center of a city. It contains commercial space and offices. In larger cities, it is often synonymous with the city's "financial district". Geographically, it often coincides with the "city center" or "downtown". However, these concepts are not mutually exclusive: many cities have a central business district located away from its commercial and or cultural center and or downtown/city center, or even several CBDs at once. The CBD is characterized as the area within a city with the highest accessibility plus having a greater variety and concentration of specialized goods and services than any other area.
New York, often called New York City (NYC) to distinguish it from the state of New York, is the most populous city in the United States. With a 2020 population of 8,804,190 distributed over 300.46 square miles (778.2 km2), New York City is also the most densely populated major city in the United States. Located at the southern tip of the state of New York, the city is the center of the New York metropolitan area, the largest metropolitan area in the world by urban area. With over 20.1 million people in its metropolitan statistical area and 23.5 million in its combined statistical area as of 2020, New York is one of the world's most populous megacities. New York City has been described as the cultural, financial, and media capital of the world, significantly influencing commerce, entertainment, research, technology, education, politics, tourism, dining, art, fashion, and sports, and is the most photographed city in the world. Home to the headquarters of the United Nations, New York is an important center for international diplomacy, and has sometimes been called the capital of the world.
An urban area, or built-up area, is a human settlement with a high population density and infrastructure of built environment. Urban areas are created through urbanization and are categorized by urban morphology as cities, towns, conurbations or suburbs. In urbanism, the term contrasts to rural areas such as villages and hamlets; in urban sociology or urban anthropology it contrasts with natural environment. The creation of early predecessors of urban areas during the urban revolution led to the creation of human civilization with modern urban planning, which along with other human activities such as exploitation of natural resources led to a human impact on the environment. "Agglomeration effects" are in the list of the main consequences of increased rates of firm creation since. This is due to conditions created by a greater level of industrial activity in a given region. However, a favorable environment for human capital development would also be generated simultaneously.
New York is a state in the Northeastern United States. It is sometimes called New York State to distinguish it from its largest city, New York City. With a total area of 54,556 square miles (141,300 km2), New York is the 27th largest state geographically. With 20.2 million residents, it is the fourth most populous state in the United States as of 2021, with approximately 44% living in New York City and 40% on Long Island. The state is bordered by New Jersey and Pennsylvania to the south, and Connecticut, Massachusetts, and Vermont to the east; it has a maritime border with Rhode Island, east of Long Island, as well as an international border with the Canadian provinces of Quebec to the north and Ontario to the northwest.
Melbourne is the capital and most-populous city of the Australian state of Victoria, and the second-most populous city in both Australia and Oceania. Its name generally refers to a 9,993 km2 (3,858 sq mi) metropolitan area known as Greater Melbourne, comprising an urban agglomeration of 31 local municipalities, although the name is also used specifically for the local municipality of City of Melbourne based around its central business area. The city occupies much of the northern and eastern coastlines of Port Phillip Bay and spreads into the Mornington Peninsula and the hinterlands towards the Yarra Valley and the Dandenong and Macedon Ranges. It has a population over 5 million, mostly residing to the east side of the city centre, and its inhabitants are commonly referred to as "Melburnians".
Seoul, officially the Seoul Special City, is the capital and largest metropolis of South Korea. Seoul has a population of 9.7 million people, and forms the heart of the Seoul Capital Area with the surrounding Incheon metropolis and Gyeonggi province. Considered to be a global city and rated as an Alpha – City by Globalization and World Cities Research Network (GaWC), Seoul was the world's 4th largest metropolitan economy in 2014 after Tokyo, New York City and Los Angeles. International visitors generally reach Seoul via AREX from Incheon International Airport, notable for having been rated the best airport for nine consecutive years (2005–2013) by Airports Council International. In 2015, it was rated Asia's most livable city with the second highest quality of life globally by Arcadis, with the GDP per capita (PPP) in Seoul being around $40,000. In 2017, the cost of living in Seoul was ranked the 6th highest globally. In 2020, Seoul's real estate market was ranked 3rd in the world for the price of apartments in the downtown center. Seoul was one of the host cities for the official tournament of the 2002 FIFA World Cup, which was co-hosted by South Korea and Japan.
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