Population density in the context of Sakai, Fukui

An urban area is a human settlement with a high population density and an infrastructure of built environment. Urban areas originate through urbanization, and researchers categorize them as cities, towns, conurbations or suburbs. In urbanism, the term "urban area" contrasts to rural areas such as villages and hamlets; in urban sociology or urban anthropology, it often contrasts with natural environment.

The development of earlier predecessors of modern urban areas during the urban revolution of the 4th millennium BCEled to the formation of human civilization and ultimately to modern urban planning, which along with other human activities such as exploitation of natural resources has led to a human impact on the environment.

The Greater Tokyo Area is the most populous metropolitan area in the world, consisting of the Kantō region of Japan (including Tokyo Metropolis and the prefectures of Chiba, Gunma, Ibaraki, Kanagawa, Saitama, and Tochigi) as well as the prefecture of Yamanashi of the neighboring Chūbu region. In Japanese, it is referred to by various terms, one of the most common being Capital Region (首都圏, Shuto-ken).

As of 2016, the United Nations estimates the total population at 38,140,000. It covers an area of approximately 13,500 km (5,200 mi), giving it a population density of 2,642 people/km. It is the second-largest single metropolitan area in the world in terms of built-up or urban function landmass at 8,547 km (3,300 mi), behind only the New York City metropolitan area at 11,642 km (4,495 mi). With over US$2 trillion in GDP, Tokyo remains the second-largest metropolitan economy in the world, also behind New York.

Shibuya (渋谷区, Shibuya-ku; IPA: [ɕibɯja] ) is a special ward in Tokyo, Japan. A major commercial center, Shibuya houses one of the busiest railway stations in the world, Shibuya Station.

As of January 1, 2024, Shibuya Ward has an estimated population of 230,609 in 142,443 households and a population density of 15,262.01 people per square kilometre (39,528.4 people/sq mi). The total area is 15.11 km (5.83 sq mi). Notable neighborhoods and districts of Shibuya include Harajuku, Ebisu, Omotesandō, Yoyogi and Sendagaya.

Urban density is a concept used in urban planning, urban studies, and related fields to describe the intensity of people, jobs, housing units, total floor area of buildings, or some other measure of human occupation, activity, and development across a defined unit of area. In general terms, urban density describes the degree of concentration or compactness of people or development in a city. As such it is to be distinguished from other measures of population density. Urban density is considered an important factor in understanding how cities function. Research related to urban density occurs across diverse areas, including economics, health, innovation, psychology and geography as well as sustainability.

A 2019 meta-analysis of 180 studies on a vast number of economic outcomes of urban density concluded that urban density had net positive effects. However, there may be some regressive distributional effects.

In general, a rural area or a countryside is a geographic area that is located outside towns and cities. Typical rural areas have a low population density and small settlements. Agricultural areas and areas with forestry are typically described as rural, as well as other areas lacking substantial development. Different countries have varying definitions of rural for statistical and administrative purposes.

Rural areas have unique economic and social dynamics due to their relationship with land-based industry such as agriculture, forestry, and resource extraction. Rural economics can be subject to boom and bust cycles and vulnerable to extreme weather or natural disasters, such as droughts. These dynamics alongside larger economic forces encouraging urbanization have led to significant demographic declines, called rural flight, where economic incentives encourage younger populations to go to cities for education and access to jobs, leaving older, less educated, and less wealthy populations in the rural areas. Slower economic development results in poorer services like healthcare, education, and infrastructure. This cycle of poverty contributes to why three quarters of the global impoverished live in rural areas according to the Food and Agricultural Organization.

Earth has a human population of over 8.2 billion as of 2025, with an overall population density of 50 people per km (130 per sq. mile). Nearly 60% of the world's population lives in Asia, with more than 2.8 billion in the countries of India and China combined. The percentage shares of China, India and rest of South Asia of the world population have remained at similar levels for the last few thousand years of recorded history.

The world's population is predominantly urban and suburban, and there has been significant migration toward cities and urban centers. The urban population jumped from 29% in 1950 to 55.3% in 2018. Interpolating from the United Nations prediction that the world will be 51.3% urban by 2010, Ron Wimberley, Libby Morris and Gregory Fulkerson estimated 23 May 2007 would have been the first time the urban population was more populous than the rural population in history. India and China are the most populous countries, as the birth rate has consistently dropped in wealthy countries and until recently remained high in poorer countries. Tokyo is the largest urban agglomeration in the world.

Pori (Finnish: [ˈpori]; Swedish: Björneborg [bjœːrneˈborj] ; Latin: Arctopolis) is a city in Finland and the regional capital of Satakunta. It is located on the west coast of the country, on the Gulf of Bothnia. The population of Pori is approximately 83,000, while the sub-region has a population of approximately 128,000. It is the 10th most populous municipality in Finland, and the eighth most populous urban area in the country.

Pori is located some 10 kilometres (6 mi) from the Gulf of Bothnia, on the estuary of the Kokemäki River, 110 kilometres (68 mi) west of Tampere, 140 kilometres (87 mi) north of Turku and 241 kilometres (150 mi) north-west of Helsinki, the capital of Finland. Pori covers an area of 2,062.00 square kilometres (796.14 sq mi) of which 870.01 km (335.91 sq mi) is water. The population density is 71.93/km (186.3/sq mi).

This is a demography of the population of Peru including population density, ethnicity, religious affiliations and other aspects of the population.

Peru is a multiethnic country, which means that it is home to people of many different historical backgrounds. Therefore, it is a multicultural country as well. Since it is a multiethnic society, Peruvian people usually treat their nationality as a citizenship instead of an ethnicity. The Peruvian census does not contain information about ethnicity so only rough estimates are available.

Aizuwakamatsu (会津若松市, Aizuwakamatsu-shi) is a city in Fukushima Prefecture, Japan. As of 1 January 2021, the city had an estimated population of 118,159 in 50,365 households, and a population density of 310 persons per km. The total area of the city was 382.97 square kilometres (147.87 sq mi).

Kamakura (鎌倉, Kamakura; [kamakɯɾa] ), officially Kamakura City (鎌倉市, Kamakura-shi), is a city of Kanagawa Prefecture in Japan. It is located in the Kanto region on the island of Honshu. The city has an estimated population of 172,929 (1 September 2020) and a population density of 4,359 people per km over the total area of 39.67 km (15.32 sq mi). Kamakura was designated as a city on 3 November 1939.

Kamakura was Japan's de facto capital when it was the seat of the Kamakura shogunate from 1185 to 1333, established by Minamoto no Yoritomo. It was the first military government in Japan's history. After the downfall of the shogunate, Kamakura saw a temporary decline. However, during the Edo period, it regained popularity as a tourist destination among the townspeople of Edo. Despite suffering significant losses of historical and cultural assets due to the Great Kantō Earthquake in 1923, Kamakura continues to be one of the major tourist attractions in the Kanto region, known for its historical landmarks such as Tsurugaoka Hachimangū and the Great Buddha of Kamakura.

The following is a list of countries and dependencies ranked by population density, sorted by inhabitants per square kilometre or square mile. The list includes sovereign states and self-governing dependent territories based upon the ISO standard ISO 3166-1. The list also includes unrecognized but de facto independent countries. The figures in the table are based on areas including internal bodies of water such as bays, lakes, reservoirs and rivers. The list does not include entities not on ISO 3166-1, except for states with limited recognition. Thus constituent countries that are not included on ISO 3166-1, and other entities not on ISO 3166-1 such as the European Union, are not included.

Unless otherwise noted, areas and populations are sourced from the United Nations World Population Prospects, which uses the latest censuses and official figures, as well as figures from the Food and Agriculture Organization, an agency of the UN. Data is current as of 2025.

Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeast, France to the south, and the North Sea to the west. Belgium covers an area of 30,689 km (11,849 sq mi) and has a population of more than 11.8 million; its population density of 383/km (990/sq mi) ranks 22nd in the world and sixth in Europe. The capital and largest metropolitan region is Brussels; other major cities are Antwerp, Ghent, Charleroi, Liège, Bruges, Namur, and Leuven.

Belgium is a parliamentary constitutional monarchy with a complex federal system structured on regional and linguistic grounds. The country is divided into three highly autonomous regions: the Flemish Region (Flanders) in the north, the Walloon Region (Wallonia) in the south, and the Brussels-Capital Region in the middle. Belgium is also home to two main linguistic communities: the Dutch-speaking Flemish Community, which constitutes about 60 percent of the population, and the French-speaking French Community, which constitutes about 40 percent of the population; a small German-speaking Community, comprising around one percent of the population, exists in the East Cantons. Belgium's linguistic diversity and related political conflicts are reflected in its complex system of governance, made up of six different governments. Belgium is a developed country with an advanced high-income economy. It is one of the six founding members of the European Union, with its capital of Brussels serving as the de facto capital of the EU, hosting the official seats of the European Commission, the Council of the European Union, the European Council, and one of two seats of the European Parliament (the other being Strasbourg). Brussels also hosts the headquarters of many major international organizations, such as NATO.

Sastamala (Finnish pronunciation: [ˈsɑstɑˌmɑlɑ]) is a town in Finland, located in the Pirkanmaa region. Sastamala lies on both sides of River Kokemäenjoki in the southwest corner of Pirkanmaa. The population of Sastamala is approximately 23,000, while the sub-region has a population of approximately 26,000. It is the 44th most populous municipality in Finland.

Sastamala has an area of 1,531.75 square kilometres (591.41 sq mi) of which 96.14 km (37.12 sq mi) is water, making it the largest municipality in the Pirkanmaa region in terms of area. The population density is 16.4 inhabitants per square kilometre (42/sq mi). The municipality is unilingual in Finnish.

In the United States, a metropolitan statistical area (MSA) is a geographical region with a relatively high population density at its core and close economic ties throughout the region. Such regions are not legally incorporated as a city or town would be and are not legal administrative divisions like counties or separate entities such as states. As a result, sometimes the precise definition of a given metropolitan area will vary between sources. The statistical criteria for a standard metropolitan area were defined in 1949 and redefined as a metropolitan statistical area in 1983.

Due to suburbanization, the typical metropolitan area is polycentric rather than being centered around a large historic core city such as New York City or Chicago. Some metropolitan areas include more than one large historic core city; examples include the Dallas–Fort Worth metroplex, Virginia Beach–Norfolk–Newport News (Hampton Roads), Riverside–San Bernardino (Inland Empire), and Minneapolis–Saint Paul (Twin Cities).

A megacity is a very large city, typically with a population of more than 10 million people. The United Nations Department of Economic and Social Affairs (UN DESA) in its "World Urbanization Prospects" report defines megacities as urban agglomerations with over 10 million inhabitants. A University of Bonn report holds that they are "usually defined as metropolitan areas with a total population of 10 million or more people". Elsewhere in other sources, from five to eight million is considered the minimum threshold, along with a population density of at least 2,000 per square kilometre. The terms conurbation, metropolis, and metroplex are also applied to the latter.

The total number of megacities in the world varies between different sources and their publication dates. The world had 32 according to EU Global Human Settlement Layer (in 2024), 33 according to UN DESA (in 2025), 39 according to the OECD, 42 according to Demographia (in 2025), and 45 according to CityPopulation.de (in 2023). The later two add 13 additional cities that are calculated outside the range otherwise. In total, at most 53 unique places are mentioned as megacities across these sources, although some of these are just agglomerated differently between them. A good percentage of these urban agglomerations are in China and India. The other three-to-five countries with more than one megacity are Brazil, Indonesia, Japan, Pakistan, and the United States. African megacities are present in Angola, Democratic Republic of the Congo, Egypt, Nigeria and South Africa; European megacities are present in France, Germany, Russia, the United Kingdom, and Turkey (also in Asia); megacities can be found in Latin America in the countries of Brazil, Mexico, Colombia, Peru, and Argentina.