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Largest Countries in the World by Population Density in 2021 (People per Square Kilometers)

  • Macau SAR, China was the most densely populated country in the world with a population density of 21,055 people per square kilometers in 2021
  • Monaco with a population density of 19,493 people per square kilometers was the second most densely populated country in the world
  • Macau SAR, China witnessed a population density growth of 1.40% in 2021 compared to the previous year

Global Population Density Outline

Population is defined as the total number of people residing in a country or region and the term "population density" refers to the number of people per square kilometer of land.

Macau SAR, China, Monaco, Singapore, Hong Kong, Gibraltar, Bahrain, Maldives, Malta, Bermuda, and Bangladesh are the largest countries in the world by population density in 2021.

With a population density of 21,054 per square kilometer, Macao in China was the most densely populated country in the world in 2021. Monaco ranks second in population density, with 19,493 people per square kilometer. China and Monaco were the only countries with a population density of over 10,000 people per square kilometer. Singapore was the third most densely populated country in the world with a population density of 7,692 people per square kilometer in 2021. Hong Kong and Gibraltar were among the fourth and fifth most densely populated countries in the world with a population density of 7,042 and 2,951 people per square kilometer in 2021.

Other prominent countries that were densely populated in 2021 include Bahrain, Maldives, Malta, Bangladesh, and Sint Maarten.

Factors Affecting the Population Density of a Country  

There are multiple physical factors including terrain, climate, water supply, and soil that can affect the population density of an individual country. Female infertility rates, Birth rates, healthcare facilities, increasing urbanization, immigration & emigration rates, education, and other social & cultural aspects are among the other major factors that affect the population distribution and density.  

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