FIPS state codes were numeric and two-letter alphabetic codes defined in U.S. Federal Information Processing Standard Publication ("FIPS PUB") 5-2 to identify U.S. states and certain other associated areas. The standard superseded FIPS PUB 5-1 on May 28, 1987, and was superseded on September 2, 2008, by ANSI standard INCITS 38:2009.
The codes are used in Geographic Names Information System, overseen by the U.S. Board on Geographic Names. The codes were assigned by NIST and each uniquely identified a state, the District of Columbia, or an outlying area of the U.S.. These codes were used by the U.S. Census Bureau, the Department of Agriculture to form milk-processing plant numbers, some cash registers during check approval, and in the Emergency Alert System (EAS).
The FIPS state alpha code for each U.S. states and the District of Columbia are identical to the postal abbreviations by the United States Postal Service. From September 3, 1987, the same was true of the alpha code for each of the outlying areas, with the exception of U.S. Minor Outlying Islands (UM) as the USPS routes mail for these islands indirectly.
Each of the various minor outlying islands that fell within alpha code UM had an individual numeric code, but no individual alpha code.
The following table enumerates the FIPS state alpha and numeric codes for the states, the District of Columbia, the outlying areas of the United States, the freely associated states, and trust territory, and FIPS state numeric codes for the individual minor outlying island territories.
Only actual U.S. states and the District of Columbia had FIPS state numeric codes in the range 01 through 56.
FIPS PUB 5-1 (published on June 15, 1970, and superseded by FIPS PUB 5-2 on May 28, 1987) stated that certain numeric codes "are reserved for possible future use in identifying American Samoa (03), Canal Zone (07), Guam (14), Puerto Rico (43), and Virgin Islands (52)", but these codes were omitted from FIPS PUB 5-2 without comment. These areas are marked with a * and highlighted in red in the table below.
For states, the "Status" column in the table below includes a link to a list of the counties (boroughs and census areas in Alaska; parishes in Louisiana) for that state including the county codes as defined in FIPS PUB 6-4. The listings of counties for other areas are set out at the end of this article.
|Name||Alpha code||Numeric code||Status|
|American Samoa||AS||60||Outlying area under U.S. sovereignty|
|American Samoa *||03||(FIPS 5-1 reserved code)|
|Baker Island||81||Minor outlying island territory|
|Canal Zone *||07||(FIPS 5-1 reserved code)|
|District of Columbia||DC||11||Federal district|
|Federated States of Micronesia||FM||64||Freely Associated State|
|Guam *||14||(FIPS 5-1 reserved code)|
|Guam||GU||66||Outlying area under U.S. sovereignty|
|Howland Island||84||Minor outlying island territory|
|Jarvis Island||86||Minor outlying island territory|
|Johnston Atoll||67||Minor outlying island territory|
|Kingman Reef||89||Minor outlying island territory|
|Marshall Islands||MH||68||Freely Associated State|
|Midway Islands||71||Minor outlying island territory|
|Navassa Island||76||Minor outlying island territory|
|New Hampshire||NH||33||State; counties|
|New Jersey||NJ||34||State; counties|
|New Mexico||NM||35||State; counties|
|New York||NY||36||State; counties|
|North Carolina||NC||37||State; counties|
|North Dakota||ND||38||State; counties|
|Northern Mariana Islands||MP||69||Outlying area under U.S. sovereignty|
|Palau||PW||70||Freely Associated State|
|Palmyra Atoll||95||Minor outlying island territory|
|Puerto Rico *||43||(FIPS 5-1 reserved code)|
|Puerto Rico||PR||72||Outlying area under U.S. sovereignty|
|Rhode Island||RI||44||State; counties|
|South Carolina||SC||45||State; counties|
|South Dakota||SD||46||State; counties|
|U.S. Minor Outlying Islands||UM||74||Minor outlying island territories (aggregated)|
|Virgin Islands of the U.S. *||52||(FIPS 5-1 reserved code)|
|Virgin Islands of the U.S.||VI||78||Outlying area under U.S. sovereignty|
|Wake Island||79||Minor outlying island territory|
|West Virginia||WV||54||State; counties|
|EAS code||Maritime area|
|57||Pacific coast from Washington to California|
|61||American Samoa waters|
|65||Mariana Islands waters (including Guam)|
|73||Atlantic coast from Maine to Virginia|
|75||Atlantic coast from North Carolina to Florida, and the coasts of Puerto Rico and Virgin Islands|
|77||Gulf of Mexico|
|94||St. Clair River, Detroit River, and Lake St. Clair|
|97||Niagara River and Lake Ontario|
|98||St. Lawrence River|