ISO 3166-2:US is the entry for the United States in ISO 3166-2, part of the ISO 3166 standard published by the International Organization for Standardization (ISO), which defines codes for the names of the principal subdivisions (e.g., provinces or states) of all countries coded in ISO 3166-1.

Currently for the United States, ISO 3166-2 codes are defined for the following subdivisions:

  • 50 states
  • one district (i.e., the District of Columbia, the capital of the country, also known as Washington, D.C.)
  • six insular areas (including the U.S. Minor Outlying Islands, a collection of nine islands or groups of islands). (The subdivision category name used to refer to the grouping of insular areas is "outlying area" per the standard, but these locales are not "outlying" from a local perspective.)

Each code consists of two parts separated by a hyphen. The first part is US, the ISO 3166-1 alpha-2 code of the United States. The second part is two letters, which is the postal abbreviation of the state, district, or outlying area, except the United States Minor Outlying Islands which do not have a postal abbreviation.

Current codes

Subdivision names are listed as in the ISO 3166-2 standard published by the ISO 3166 Maintenance Agency (ISO 3166/MA).

CodeSubdivision name in EnglishSubdivision category
US-ALAlabamaState
US-AKAlaskaState
US-AZArizonaState
US-ARArkansasState
US-CACaliforniaState
US-COColoradoState
US-CTConnecticutState
US-DEDelawareState
US-FLFloridaState
US-GAGeorgia (U.S. state)State
US-HIHawaiiState
US-IDIdahoState
US-ILIllinoisState
US-INIndianaState
US-IAIowaState
US-KSKansasState
US-KYKentuckyState
US-LALouisianaState
US-MEMaineState
US-MDMarylandState
US-MAMassachusettsState
US-MIMichiganState
US-MNMinnesotaState
US-MSMississippiState
US-MOMissouriState
US-MTMontanaState
US-NENebraskaState
US-NVNevadaState
US-NHNew HampshireState
US-NJNew JerseyState
US-NMNew MexicoState
US-NYNew YorkState
US-NCNorth CarolinaState
US-NDNorth DakotaState
US-OHOhioState
US-OKOklahomaState
US-OROregonState
US-PAPennsylvaniaState
US-RIRhode IslandState
US-SCSouth CarolinaState
US-SDSouth DakotaState
US-TNTennesseeState
US-TXTexasState
US-UTUtahState
US-VTVermontState
US-VAVirginiaState
US-WAWashingtonState
US-WVWest VirginiaState
US-WIWisconsinState
US-WYWyomingState
US-DCDistrict of ColumbiaDistrict
US-ASAmerican SamoaOutlying area
US-GUGuamOutlying area
US-MPNorthern Mariana IslandsOutlying area
US-PRPuerto RicoOutlying area
US-UMUnited States Minor Outlying IslandsOutlying area
US-VIUnited States Virgin IslandsOutlying area

Subdivisions included in ISO 3166-1

Besides being included as subdivisions of the United States in ISO 3166-2, the outlying areas are also officially assigned their own country codes in ISO 3166-1.

CodeSubdivision name in EnglishAlpha-2 codeISO 3166-2 codes
US-ASAmerican SamoaASISO 3166-2:AS
US-GUGuamGUISO 3166-2:GU
US-MPNorthern Mariana IslandsMPISO 3166-2:MP
US-PRPuerto RicoPRISO 3166-2:PR
US-UMUnited States Minor Outlying IslandsUMISO 3166-2:UM
US-VIUnited States Virgin IslandsVIISO 3166-2:VI

See also