The United States of America (USA) is a federal constitutional republic consisting of fifty states and one federal district, located mostly in central North America, between Canada and Mexico. It is the third or fourth largest country on earth, with an area of 9.8 million km2. With over 328 million inhabitants, it is the third most populous country in the world. The country’s federal district is Washington, D.C. and its most populous city is New York.
The total land area of the United States is approximately 3.8 million square miles (9.8 million square kilometers). It’s important to note that land area figures can vary slightly depending on the source and the method of measurement. For the most current and accurate information, you may want to check with reliable sources such as the United States Census Bureau or other official government publications.
Ethnic composition of the United States of America, Ethnicity White (59.3%), African-Americans (13.6%), Asian (6.1%), American Indian and Alaska Native (1.3%), Other ethnicities (0.8%), Hispanic/Latino (18.9%).