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.
Australia is not the world's largest nation in area. It is the smallest continent. Therefore, the nation that is currently the world's largest would still be the world's largest - and that is the Russian federation, with an area of 178,075,400 sq km.
Monaco is the second smallest nation, after Vatican City.
No, Tuvalu (at 10 sq. mi.) is the fourth smallest nation, after Vatican City, Monaco, and Nauru.
Sealand is not recognized as a nation. The smallest recognized nation is Vatican City, at 0.17 square miles.
Rhode Island is the smallest state in the nation.
Singapore
Rome.
Egypt
San Marino
The smallest region in Asia is the nation of Singapore. The entire country comprises only 276.5 square miles. By comparison, Russia covers over 6 million square miles.