According to the United Nations, what was the most densely populated country in the world as of 2015?
Monaco is the world's second smallest country in the world and considered the world's most densely populated country. The total area of Monaco is 2.2 km (0.78 sq. mi) with a population of 37,831 in 2015. Population density is calculated as population divided by total land area. The United Nations stated Monaco's population density was 25,718.12/km.
Technically, not a country but a Special Administrative Region of China, Macao had a population of 584,420 in 2015 with a total area of 115.3 km (44.5 sq. mi). It's population density was 22,477.69/km.
Hong Kong, also a Special Administrative Area of China, had a population of 7,313,577 in 2015 and a total land area of 2,755 km (1,064 sq. mi). It's population density in 2015 was 6,654,74/km.
Singapore, an island city-state, had a population of 5,618,866 in 2015 and a land area of 719.9 km (278.0 sq. mi). Its population density was 8,226.74/km.
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