United States of America
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| Capital | |
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| Largest city | |
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| Official languages | None at federal level[a] |
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| National language | English |
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| Ethnic groups | |
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| Religion | See Religion in the United States |
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| Demonym(s) | American[b][9] |
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| Government | Federalpresidentialconstitutional republic |
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| Donald Trump (R) |
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| Mike Pence (R) |
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| Nancy Pelosi (D) |
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| John Roberts |
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| Legislature | Congress |
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| Senate |
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| House of Representatives |
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| Independence |
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| July 4, 1776 |
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| March 1, 1781 |
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| September 3, 1783 |
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| June 21, 1788 |
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| September 25, 1789 |
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| August 21, 1959 |
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| May 5, 1992 |
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| Area |
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• Total area | 3,796,742 sq mi (9,833,520 km2)[d][10] (3rd/4th) |
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• Water (%) | 4.66 (as of 2015)[11] |
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• Total land area | 3,531,905 sq mi (9,147,590 km2) |
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| Population |
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• 2019 estimate |  328,239,523[8] (3rd) |
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• 2010 census | 308,745,538[e][12] (3rd) |
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• Density | 87/sq mi (33.6/km2) (146th) |
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| GDP (PPP) | 2020 estimate |
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• Total |  $20.807 trillion[13] (2nd) |
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• Per capita | $63,051[13] (7th) |
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| GDP (nominal) | 2020 estimate |
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• Total | $20.807 trillion[13] (1st) |
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• Per capita | $63,051[13] (5th) |
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| Gini (2020) |  48.5[14]
high |
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| HDI (2018) | 0.920[15]
very high · 15th |
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| Currency | United States dollar ($) (USD) |
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| Time zone | UTC−4 to −12, +10, +11 |
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| UTC−4 to −10[f] |
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| Date format | |
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| Mains electricity | 120 V–60 Hz |
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| Driving side | right[g] |
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| Calling code | +1 |
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| ISO 3166 code | US |
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| Internet TLD | - Generic top-level domain
- .com, .org, .net, .edu, .gov, .mil
- ccTLD (generally not used in the U.S.)
- .us, .pr, .as, .gu, .mp, .vi and, formerly, .um (removed by ICANN in 2008, but still recognized by the U.S. government as a ccTLD)
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328,239,523
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