United States
Written by Warren W. Hassler, Jr.View All Contributors
United States Quick Facts
1Excludes 5 nonvoting delegates from the District of Columbia, the U.S. Virgin Islands, American Samoa, the Northern Mariana Islands, and Guam and a nonvoting resident commissioner from Puerto Rico. 2Includes inland water area of 78,797 sq mi (204,083 sq km) and Great Lakes water area of 60,251 sq mi (156,049 sq km); excludes coastal water area of 42,225 sq mi (109,362 sq km) and territorial water area of 75,372 sq mi (195,213 sq km). |
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| Official name | United States of America |
|---|---|
| Form of government | federal republic with two legislative houses (Senate [100]; House of Representatives [4351]) |
| Head of state and government | President: Barack Obama |
| Capital | Washington, D.C. |
| Official language | none |
| Official religion | none |
| Monetary unit | dollar (U.S.$) |
| Population | (2010) 308,745,538; (2012 est.) 314,250,000 |
| Total area (sq mi) | 3,678,1902 |
| Total area (sq km) | 9,526,4682 |
| Urban-rural population | Urban: (2011) 82.4% Rural: (2011) 17.6% |
| Life expectancy at birth | Male: (2011) 76.3 years Female: (2011) 81.1 years |
| Literacy: percentage of population age 15 and over literate | Male: (2000–2004) 95.7% Female: (2000–2004) 95.3% |
| GNI per capita (U.S.$) | (2011) 48,450 |
