Vatican City
Malta is the smallest and least populous of the European Union countries.
The least populous country in the Caribbean is Saint Kitts and Nevis, with a population of around 55,000.
the least populous country in North America is considered to be Greenland
Vatican City is the least populous country in the world.
Germany is the most populous European country after Russia.
Germany is the most populous country that is wholly in Europe
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According to wikipedia it says its Russia is the most populous European nation and rank 2 goes to Turkey. However some consider both Turkey and Russia as not being European countries. But rather they are Eurasian countries. There's a big difference. Among the proper European countries, as of 2022, the most populous is Germany at ~83 million people and rank 2 being France at ~68 million.
no Within the European Union (EU), Italy is a large, populous and - on the whole - prosperous country.
Oslo is the capital and the most populous city in Norway.
China is the most populous country in the world.
Namibia is the second least-populous country in the world, so you can say it is underpopulated.