Between 2015 and 2100 the top 5 most populous countries worldwide is expected to remain fixed, according to data from the UN Department of Social and Economic Affairs.
Africa's anticipated population boom will shake up the top 20 and move Nigeria - the continent's most populous country - up from the 65th to 21st most densely populated country worldwide. Other African countries, however, will surpass Nigeria by population density, including Burundi, Comoros, Malta, Rwanda, Uganda, Malawi, and Gambia.
In contrast, spacious countries in different stages of their demographic transitions will move around in the rankings but remain well within the crowd of the lower population density countries. By 2100, the population density of the United States is expected to increase slightly from 173rd to 170th place - an increase of about 14 people per sq km - while in Russia the population density is expected to decrease slightly moving it from 212th to 217th position, or a decrease of about 1.6 people per sq km.