United States country codes

United States at a glance

The ISO country identifiers for United States are US, USA, and 840. Select the format your form or system requests.

Namename

United States

Native name in sourcenative_name

United States

Capital / administrative centrecapital

Washington, D.C.

Continentcontinent

North America (NA)

Regionregion

Americas

Sub-regionsub_region

Northern America

Calling prefixes, currency & internet domain

International calling prefixdial_code

+1

Currency referencecurrency_code

USDUS Dollar

Country-code domaintld

.us

A listed telephone prefix may combine a shared country calling code with an area code. It is not a complete phone number.

Languages & native names

Languages listed for United States in the reference source, with native language names where available. This is not an exhaustive list of the languages spoken or a statement of their legal status.

The small codes are source language tags. A tag such as en-US includes a language and a regional variant; it is different from an ISO country code on its own.

United States time zones

29 identifiers are listed for US in IANA zone.tab, release 2026d. Time-zone identifiers describe clock-rule locations, not fixed UTC offsets.

• America/New_York
• America/Detroit
• America/Kentucky/Louisville
• America/Kentucky/Monticello
• America/Indiana/Indianapolis
• America/Indiana/Vincennes
• America/Indiana/Winamac
• America/Indiana/Marengo
• America/Indiana/Petersburg
• America/Indiana/Vevay
• America/Chicago
• America/Indiana/Tell_City
• America/Indiana/Knox
• America/Menominee
• America/North_Dakota/Center
• America/North_Dakota/New_Salem
• America/North_Dakota/Beulah
• America/Denver
• America/Boise
• America/Phoenix
• America/Los_Angeles
• America/Anchorage
• America/Juneau
• America/Sitka
• America/Metlakatla
• America/Yakutat
• America/Nome
• America/Adak
• Pacific/Honolulu

UTC offsets and daylight-saving rules depend on the date and location. Use the time-zone converter to compare local times for a chosen date.

ISO, sporting & legacy identifiers

These code systems serve different purposes. Similar-looking codes can refer to different places or organisations.

ISO alpha-2iso_alpha_2

US

ISO alpha-3iso_alpha_3

USA

ISO numericiso_numeric

840

FIFA referencefifa

USA

IOC referenceioc

USA

Legacy FIPS-style referencefips

US

FIFA and IOC values are source references, not confirmation of current membership or event participation. FIPS 10-4 was withdrawn in 2008; legacy FIPS-style values are for interpreting older datasets and must not replace current ISO codes.

Sources & reference notes

The base record is from ListBase.org v2026.08. English and native country names use Annexare Countries, language names use Annexare and runtime display-name data, time zones use IANA 2026d, and the locally hosted flag is from flag-icons.