It depends exactly what you mean by nation. If you include dependent territories, Pitcairn Islands have a population of precisely 54 . The Vatican has a population of precisely 826 according to the 2009 census. Tuvalu has a population of precisely 12,373. Nauru has a population of precisely 13,770.
The Vatican City (yes it is a nation!)
The smallest island nation is Nauru.
The smallest is Vatican City. See Link for a list of the 17 smallest nations in the world.
the worlds most populous nation is china ;)
PEI is the smallest province. It's also the least populated. However, if you include Territories, then Nunavut is the least populated.
The Pitcairn Islands have a population of around 50 making it the least populated jurisdiction in the world, although it is not a sovereign nation. The Vatican is the world's smallest and least populated country at about 920 people.
No Australia is the worlds smallest continent. It is geographically a large country. with a relatively small population. however there are many country's in the world with a smaller population.
China is the most populated nation in the world.
Australia is the worlds smallest continent; however the least populated is Antarctica. Technically Australia is not an island. If it was, so would every other place in the world as everything is surrounded by water. Continents are not islands. The largest island in the world is Greenland.
Yes, China is the worlds most populated country with a population of 1.3 billion.
Delaware
The worlds smallest passenger plane is probably a piper jet