United States
United States of America
United States, officially the United States of America, is a federal presidential constitutional republic with its capital in Washington D.C.. This page brings together source-cited key facts, international memberships, economic and social indicators and practical information.
Key facts
Core reference data for United States. Numbers in brackets link to the sources at the end of this page.
- Official name
- United States of America [1]
- Capital
- Washington D.C. [2]
- Official language
- English [2]
- Population
- 341,784,857 [2]2025
- Area
- 9,833,517 km² [2]
- Currency
- US Dollar (USD)
- Time zone
- America/New_York [4]
- Calling code
- +1
- Internet domain
- .us
- UN member since
- 24 October 1945 [3]
- Recognition
- Universally Recognized
- Official portal
- usa.gov
Government and leadership
International memberships
Membership status in major international organizations and groups.
- UNUnited Nations, since 1945Member
- NATONorth Atlantic Treaty OrganizationMember
- IMFInternational Monetary FundMember
- World BankWorld Bank GroupMember
- WTOWorld Trade OrganizationMember
- G20Group of TwentyMember
- G7Group of SevenMember
- UNSC P5Permanent seat, UN Security CouncilMember
- EUEuropean UnionNot a member
- SchengenSchengen AreaNot a member
Economy
Headline indicators. Values marked est. are projections for the current or a future year.
Geography
- Area
- 9,833,517square kilometres
- Coastline
- 19,924kilometres
- Highest point
- 6,190 mDenali
- Coordinates
- 38.8895, -77.032Geographic centre (approx.)
Bordering countries
Society and development
- Life expectancy
- 78.9 years [10]Reference year not recorded
- Literacy rate
- 99.0% [10]2023
- Human Development Index
- 0.927 [6]Rank 20, 2022
- Corruption Perceptions Index
- 65/100 [7]Reference year not recorded
- Press freedom rank
- 64 [8]Reference year not recorded
- Internet use
- 94.7% [10]of population
- International tourist arrivals
- 45.0 M [11]2020
- Majority religion
- Christianity
Practical information
- Emergency number
- 911
- Driving side
- Right
- Electricity
- 120
- Plug types
- Type A
- Type B
- Tap water
- Generally safe to drinkLocal conditions can vary; follow local advice.
- Calling code
- +1
Travel and visa
- Passport rank
- 10 [9]Henley Passport Index
- Visa-free or on-arrival access
- 182 [9]destinations for this country's passport holders
Visiting United States? Check official sources before you travel
Entry requirements depend on your nationality, the purpose of your trip and the length of your stay, and they can change at short notice. NexaNations does not provide immigration or legal advice.
Quick answers
What is the capital of United States?
The capital of United States is Washington D.C..
What currency does United States use?
United States uses the US Dollar (USD).
What is the official language of United States?
The official language of United States is English.
What is the emergency number in United States?
The emergency number in United States is 911.
Which side of the road do people drive on in United States?
In United States, traffic drives on the right.
Sources
- Official government portal of United States. usa.gov
- Wikidata, item Q30. wikidata.org
- United Nations, member states. un.org
- GeoNames, entry 6252001. geonames.org
- International Monetary Fund, World Economic Outlook. imf.org
- United Nations Development Programme, Human Development Report. hdr.undp.org
- Transparency International, Corruption Perceptions Index. transparency.org
- Reporters Without Borders, World Press Freedom Index. rsf.org
- Henley and Partners, Henley Passport Index. henleyglobal.com
- World Bank, World Development Indicators. data.worldbank.org
- UN Tourism, tourism statistics. untourism.int
Data last updated on 24 September 2026. Read how we select and verify sources in our methodology.
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