The top five largest countries in the world, by land area, are:
1. Russia
2. Canada
3. China
4. United State (US)
5. Brazil
Russia 
Russia is a country located in northern Eurasia and is the largest country in the world by land area, covering 17,098,242 square kilometers. It spans 11 time zones and shares borders with Norway, Finland, Estonia, Latvia, Lithuania, Poland, Belarus, Ukraine, Georgia, Azerbaijan, Kazakhstan, Mongolia, China and North Korea. Russia is a federal semi-presidential republic and its capital is Moscow. Its population is 144 million people.
Canada
Canada is a country in North America and is the second largest country in the world by land area, covering 9,984,670 square kilometers. It is bordered by the United States to the south and the north by the Arctic Ocean. Canada is a federal parliamentary democracy and a constitutional monarchy, with Queen Elizabeth II as its head of state. Its capital is Ottawa and its largest city is Toronto. The population of Canada is approximately 38 million people.
China
China is a country located in East Asia and is the third largest country in the world by land area, covering 9,596,961 square kilometers. It is the most populous country in the world, with a population of approximately 1.4 billion people. China is a one-party communist state, with the Communist Party of China as the only legal political party. Its capital is Beijing and its largest city is Shanghai. China has a rich history and cultural heritage, and is a major player in international politics and the global economy.
United State
The United States of America (USA) is a country located in North America and is the fourth largest country in the world by land area, covering 9,147,593 square kilometers. It is bordered by Canada to the north and Mexico to the south. The United States is a federal constitutional republic with a democratic system of government, and is considered to be one of the world's largest and most powerful countries. Its capital is Washington D.C., and its largest city is New York City. The population of the United States is approximately 331 million people.
Brazil
Brazil is a country located in South America and is the fifth largest country in the world by land area, covering 8,515,767 square kilometers. It is bordered by various South American countries including Argentina, Bolivia, Colombia, Guyana, Paraguay, Peru, Suriname, Uruguay, and Venezuela. Brazil is a federal presidential constitutional republic and its capital is BrasÃlia. Its largest city is São Paulo. With a population of approximately 212 million people, Brazil is the most populous country in South America and the second most populous country in the Americas, after the United States.