United States is 27 times larger than Congo.
Area: 342,000 km2 World Factbook
Population: 4,662,446 (July 2014) World Factbook
The Republic of the Congo, also known as Congo or Congo-Brazzaville, is a country located in Central Africa. It is bordered by Gabon, Cameroon, the Central African Republic, the Democratic Republic of the Congo and the Angolan exclave of Cabinda. Wikipedia
The United States of America, commonly referred to as the United States, America, and sometimes the States, is a federal republic consisting of 50 states and a federal district. The 48 contiguous states and Washington, D.C., are in central North America between Canada and Mexico. Wikipedia