In 2025, approximately 23 million people lived in the São Paulo metropolitan area, making it the biggest in Latin America and the Caribbean and the sixth most populated in the world. The homonymous state of São Paulo was also the most populous federal entity in the country. The second place for the region was Mexico City with 22.75 million inhabitants. Brazil's cities Brazil is home to two large metropolises, only counting the population within the city limits, São Paulo had approximately 11.45 million inhabitants, and Rio de Janeiro around 6.21 million inhabitants. It also contains a number of smaller, but well known cities such as Brasília, Salvador, Belo Horizonte and many others, which report between 2 and 3 million inhabitants each. As a result, the country's population is primarily urban, with nearly 88 percent of inhabitants living in cities. Mexico City Mexico City's metropolitan area ranks sevenths in the ranking of most populated cities in the world. Founded over the Aztec city of Tenochtitlan in 1521 after the Spanish conquest as the capital of the Viceroyalty of New Spain, the city still stands as one of the most important in Latin America. Nevertheless, the preeminent economic, political, and cultural position of Mexico City has not prevented the metropolis from suffering the problems affecting the rest of the country, namely, inequality and violence. Only in 2023, the city registered a crime incidence of 52,723 reported cases for every 100,000 inhabitants and around 24 percent of the population lived under the poverty line.

Mexico MX: Population in Largest City data was reported at 21,500,251.000 Person in 2017. This records an increase from the previous number of 21,419,976.000 Person for 2016. Mexico MX: Population in Largest City data is updated yearly, averaging 15,225,498.500 Person from Dec 1960 (Median) to 2017, with 58 observations. The data reached an all-time high of 21,500,251.000 Person in 2017 and a record low of 5,479,184.000 Person in 1960. Mexico MX: Population in Largest City data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Mexico – Table MX.World Bank.WDI: Population and Urbanization Statistics. Population in largest city is the urban population living in the country's largest metropolitan area.; ; United Nations, World Urbanization Prospects.; ;

Population in largest city in Mexico was reported at 22505315 in 2024, according to the World Bank collection of development indicators, compiled from officially recognized sources. Mexico - Population in largest city - actual values, historical data, forecasts and projections were sourced from the World Bank on September of 2025.

Historical dataset of population level and growth rate for the Mexico City, Mexico metro area from 1950 to 2025.

As of 2025, Tokyo-Yokohama in Japan was the largest world urban agglomeration, with 37 million people living there. Delhi ranked second with more than 34 million, with Shanghai in third with more than 30 million inhabitants.

The Urban Place Time-Series Population of Mexico contains population counts for more than 700 urban centers every 10 years from 1921 through 1990. The urban centers include metropolitan, conurbation, and city areas with more than 5,000 inhabitants as of 1980. This data set is produced by the Columbia University Center for International Earth Science Information Network (CIESIN).

Population in the largest city (% of urban population) in Mexico was reported at 21.01 % in 2024, according to the World Bank collection of development indicators, compiled from officially recognized sources. Mexico - Population in the largest city - actual values, historical data, forecasts and projections were sourced from the World Bank on September of 2025.

The Urban Place GIS Coverage of Mexico is a vector based point Geographic Information System (GIS) coverage of 696 urban places in Mexico. Each Urban Place is geographically referenced down to one tenth of a minute. The attribute data include time-series population and selected census/geographic data items for Mexican urban places from from 1921 to 1990. The cartographic data include urban place point locations on a state boundary file of Mexico. This data set is produced by the Columbia University Center for International Earth Science Information Network (CIESIN) in collaboration with the Instituto Nacional de Estadistica Geografia e Informatica (INEGI) and the Environmental Research Institute (ERI) of Michigan.

Mexico MX: Population in Largest City: as % of Urban Population data was reported at 20.842 % in 2017. This records a decrease from the previous number of 21.105 % for 2016. Mexico MX: Population in Largest City: as % of Urban Population data is updated yearly, averaging 25.978 % from Dec 1960 (Median) to 2017, with 58 observations. The data reached an all-time high of 28.774 % in 1969 and a record low of 20.842 % in 2017. Mexico MX: Population in Largest City: as % of Urban Population data remains active status in CEIC and is reported by World Bank. The data is categorized under Global Database’s Mexico – Table MX.World Bank.WDI: Population and Urbanization Statistics. Population in largest city is the percentage of a country's urban population living in that country's largest metropolitan area.; ; United Nations, World Urbanization Prospects.; Weighted average;

In 2020, the total population of Mexico City reached 9.2 million and a population density of 6,163.3 residents by square kilometer. Population density has grown considerably in the country's capital during the past few decades, as it stood at 5,494 inhabitants per square meter in 1990.

The Urban Place Time-Series Population of Mexico contains population counts for more than 700 urban centers every 10 years from 1921 through 1990. The urban centers include metropolitan, conurbation, and city areas with more than 5,000 inhabitants as of 1980. This data set is produced by the Columbia University Center for International Earth Science Information Network (CIESIN).

It is estimated that more than 8 billion people live on Earth and the population is likely to hit more than 9 billion by 2050. Approximately 55 percent of Earth’s human population currently live in areas classified as urban. That number is expected to grow by 2050 to 68 percent, according to the United Nations (UN).The largest cities in the world include Tōkyō, Japan; New Delhi, India; Shanghai, China; México City, Mexico; and São Paulo, Brazil. Each of these cities classifies as a megacity, a city with more than 10 million people. The UN estimates the world will have 43 megacities by 2030.Most cities' populations are growing as people move in for greater economic, educational, and healthcare opportunities. But not all cities are expanding. Those cities whose populations are declining may be experiencing declining fertility rates (the number of births is lower than the number of deaths), shrinking economies, emigration, or have experienced a natural disaster that resulted in fatalities or forced people to leave the region.This Global Cities map layer contains data published in 2018 by the Population Division of the United Nations Department of Economic and Social Affairs (UN DESA). It shows urban agglomerations. The UN DESA defines an urban agglomeration as a continuous area where population is classified at urban levels (by the country in which the city resides) regardless of what local government systems manage the area. Since not all places record data the same way, some populations may be calculated using the city population as defined by its boundary and the metropolitan area. If a reliable estimate for the urban agglomeration was unable to be determined, the population of the city or metropolitan area is used.Data Citation: United Nations Department of Economic and Social Affairs. World Urbanization Prospects: The 2018 Revision. Statistical Papers - United Nations (ser. A), Population and Vital Statistics Report, 2019, https://doi.org/10.18356/b9e995fe-en.

The number of inhabitants living in the state of Mexico alone amounted to nearly 17.33 million in 2022, which accounts for around 13.44 percent of the total Mexican population. The state of Mexico has shown an overall increase in the number of population since 2008, when it had approximately 15.1 million inhabitants. Mexico is the most populated state out of the 32 United Mexican States. Further, the state of Mexico surrounds Mexico City and comprises most of its greater metropolitan area.

Population: Female: Mexico City data was reported at 4,722.761 Person th in 2018. This records an increase from the previous number of 2,773.611 Person th for 2017. Population: Female: Mexico City data is updated yearly, averaging 4,470.424 Person th from Dec 1970 (Median) to 2018, with 49 observations. The data reached an all-time high of 4,725.979 Person th in 2014 and a record low of 2,683.225 Person th in 2015. Population: Female: Mexico City data remains active status in CEIC and is reported by National Population Council. The data is categorized under Global Database’s Mexico – Table MX.G002: Population: by State.

The statistic depicts the total population of Mexico from 2020 to 2024, with projections up until 2030. In 2020, Mexico's total population amounted to about 128.21 million people. Total population of Mexico The total population of Mexico was expected to reach 116.02 million people by the end of 2013. Despite being the source of one of the largest migration flows in the world, Mexico has managed to maintain around a 1.25 percent population growth rate for the last several years, roughly the same growth rate as India. Among the largest cities in Mexico, Mexico City is leading with more than 8.5 million inhabitants. A slowly declining fertility rate still holds above the replacement rate, and life expectancy is growing, expanding the population from both ends of the age spectrum. With the rising life expectancy, the median age of Mexican residents has also increased, and an increasing stream of immigrants from the financially-troubled Spain has also boosted population numbers. The majority of the Mexican population is Roman Catholic, owing to its colonial Spanish background. Spanish is the predominant language, with several regional and local dialects spoken, but a number of indigenous languages, such as Nahuatl, survive and are also spoken around Mexico. One worrying and relatively recent trend in Mexico is the growing share of the population becoming overweight or obese. It is not entirely clear what sort of effect the obesity epidemic is going to have on Mexican population numbers in the long run, but is starting to manifest itself not just in physical appearance, but in the increased rates of heart disease, hypertension, and diabetes. In fact, diabetes was one of the top causes of deaths for Mexicans in recent years.

In 2020, population of Mexico City reached 9.2 million, accounting for around seven percent of the total Mexican population. Over the timespan of 30 years, the number of inhabitants in the country's capital grew approximately by 974,000 persons.

U.S. Census Bureau QuickFacts statistics for Mexico city, Missouri. QuickFacts data are derived from: Population Estimates, American Community Survey, Census of Population and Housing, Current Population Survey, Small Area Health Insurance Estimates, Small Area Income and Poverty Estimates, State and County Housing Unit Estimates, County Business Patterns, Nonemployer Statistics, Economic Census, Survey of Business Owners, Building Permits.

Population: Mexico City data was reported at 9,045.719 Person th in 2018. This records an increase from the previous number of 5,436.946 Person th for 2017. Population: Mexico City data is updated yearly, averaging 8,616.773 Person th from Dec 1970 (Median) to 2018, with 49 observations. The data reached an all-time high of 9,062.102 Person th in 2014 and a record low of 5,264.681 Person th in 2015. Population: Mexico City data remains active status in CEIC and is reported by National Population Council. The data is categorized under Global Database’s Mexico – Table MX.G002: Population: by State.

The Global Human Footprint dataset of the Last of the Wild Project, version 2, 2005 (LWPv2) is the Human Influence Index (HII) normalized by biome and realm. The HII is a global dataset of 1 km grid cells, created from nine global data layers covering human population pressure (population density), human land use and infraestructure (built-up areas, nighttime lights, land use/land cover) and human access (coastlines, roads, navigable rivers).The Human Footprint Index (HF) map, expresses as a percentage the relative human influence in each terrestrial biome. HF values from 0 to 100. A value of zero represents the least influence -the "most wild" part of the biome with value of 100 representing the most influence (least wild) part of the biome.

During the last census, Iztapalapa registered a total of 1.8 million inhabitants, a population higher than the eight States with the lowest population in Mexico. Gustavo A. Madero and Álvaro Obregón ranked second and third, respectively. In contrast, Milpa Alta registered only 152,685 inhabitants.