# List of U.S. state and territory abbreviations

Several sets of codes and abbreviations are used to represent the political divisions of the United States for postal addresses, data processing, general abbreviations, and other purposes.

## Table

This table includes abbreviations for three independent countries related to the United States through Compacts of Free Association, and other comparable postal abbreviations, including those now obsolete.
Codes: :
| ISO | ISO 3166 codes (2-letter, 3-letter, and 3-digit codes from ISO 3166-1; 2+2-letter codes from ISO 3166-2) |
| ANSI | 2-letter and 2-digit codes from the ANSI standard INCITS 38:2009 (supersedes FIPS 5-2) |
| USPS | 2-letter codes used by the United States Postal Service |
| USCG | 2-letter codes used by the United States Coast Guard (bold red text shows differences between ANSI and USCG) |
| Abbreviations: ||
| GPO | Older variable-length official US Government Printing Office abbreviations |
| AP | Abbreviations from the AP Stylebook (bold red text shows differences between GPO and AP) |
Codes and abbreviations for U.S. states, federal district, territories, and other regions :
| Name | Status of region | ISO | ANSI | ANSI | USPS | USCG | GPO | AP | Other abbreviations |
| United States of America | Federal state | US USA 840 | US | 00 | | | U.S. | U.S. | U.S.A. |
| Alabama | State | US-AL | AL | 01 | AL | AL | Ala. | Ala. | |
| Alaska | State | US-AK | AK | 02 | AK | AK | Alaska | Alaska | Ak. |
| Arizona | State | US-AZ | AZ | 04 | AZ | AZ | Ariz. | Ariz. | |
| Arkansas | State | US-AR | AR | 05 | AR | AR | Ark. | Ark. | |
| California | State | US-CA | CA | 06 | CA | CF | Calif. | Calif. | Cal. |
| Colorado | State | US-CO | CO | 08 | CO | CL | Colo. | Colo. | |
| Connecticut | State | US-CT | CT | 09 | CT | CT | Conn. | Conn. | |
| Delaware | State | US-DE | DE | 10 | DE | DL | Del. | Del. | |
| District of Columbia | Federal district | US-DC | DC | 11 | DC | DC | D.C. | D.C. | Dis. Col. |
| Florida | State | US-FL | FL | 12 | FL | FL | Fla. | Fla. | |
| Georgia | State | US-GA | GA | 13 | GA | GA | Ga. | Ga. | Geo. |
| Hawaii | State | US-HI | HI | 15 | HI | HA | Hawaii | Hawaii | Hi.; Haw. |
| Idaho | State | US-ID | ID | 16 | ID | ID | Idaho | Idaho | Ida. |
| Illinois | State | US-IL | IL | 17 | IL | IL | Ill. | Ill. | |
| Indiana | State | US-IN | IN | 18 | IN | IN | Ind. | Ind. | |
| Iowa | State | US-IA | IA | 19 | IA | IA | Iowa | Iowa | Ioa. |
| Kansas | State | US-KS | KS | 20 | KS | KA | Kans. | Kan. | Ka. |
| Kentucky | State | US-KY | KY | 21 | KY | KY | Ky. | Ky. | Ken., Kent. |
| Louisiana | State | US-LA | LA | 22 | LA | LA | La. | La. | |
| Maine | State | US-ME | ME | 23 | ME | ME | Maine | Maine | |
| Maryland | State | US-MD | MD | 24 | MD | MD | Md. | Md. | Mar., Mary. |
| Massachusetts | State | US-MA | MA | 25 | MA | MS | Mass. | Mass. | |
| Michigan | State | US-MI | MI | 26 | MI | MC | Mich. | Mich. | |
| Minnesota | State | US-MN | MN | 27 | MN | MN | Minn. | Minn. | |
| Mississippi | State | US-MS | MS | 28 | MS | MI | Miss. | Miss. | |
| Missouri | State | US-MO | MO | 29 | MO | MO | Mo. | Mo. | |
| Montana | State | US-MT | MT | 30 | MT | MT | Mont. | Mont. | |
| Nebraska | State | US-NE | NE | 31 | NE | NB | Nebr. | Neb. | |
| Nevada | State | US-NV | NV | 32 | NV | NV | Nev. | Nev. | |
| New Hampshire | State | US-NH | NH | 33 | NH | NH | N.H. | N.H. | |
| New Jersey | State | US-NJ | NJ | 34 | NJ | NJ | N.J. | N.J. | N. Jersey |
| New Mexico | State | US-NM | NM | 35 | NM | NM | N. Mex. | N.M. | New M., New Mex. |
| New York | State | US-NY | NY | 36 | NY | NY | N.Y. | N.Y. | N. York |
| North Carolina | State | US-NC | NC | 37 | NC | NC | N.C. | N.C. | N. Car. |
| North Dakota | State | US-ND | ND | 38 | ND | ND | N. Dak. | N.D. | |
| Ohio | State | US-OH | OH | 39 | OH | OH | Ohio | Ohio | O., Oh. |
| Oklahoma | State | US-OK | OK | 40 | OK | OK | Okla. | Okla. | |
| Oregon | State | US-OR | OR | 41 | OR | OR | Oreg. | Ore. | |
| Pennsylvania | State | US-PA | PA | 42 | PA | PA | Pa. | Pa. | Penn., Penna. |
| Rhode Island | State | US-RI | RI | 44 | RI | RI | R.I. | R.I. | R.I. & P.P. |
| South Carolina | State | US-SC | SC | 45 | SC | SC | S.C. | S.C. | S. Car. |
| South Dakota | State | US-SD | SD | 46 | SD | SD | S. Dak. | S.D. | SoDak |
| Tennessee | State | US-TN | TN | 47 | TN | TN | Tenn. | Tenn. | |
| Texas | State | US-TX | TX | 48 | TX | TX | Tex. | Texas | |
| Utah | State | US-UT | UT | 49 | UT | UT | Utah | Utah | Ut. |
| Vermont | State | US-VT | VT | 50 | VT | VT | Vt. | Vt. | Verm. |
| Virginia | State | US-VA | VA | 51 | VA | VA | Va. | Va. | Virg. |
| Washington | State | US-WA | WA | 53 | WA | WN | Wash. | Wash. | Wn. |
| West Virginia | State | US-WV | WV | 54 | WV | WV | W. Va. | W.Va. | W.V., W. Virg. |
| Wisconsin | State | US-WI | WI | 55 | WI | WS | Wis. | Wis. | Wisc. |
| Wyoming | State | US-WY | WY | 56 | WY | WY | Wyo. | Wyo. | |
| American Samoa | Insular area (Territory) | AS ASM 016 US-AS | AS | 60 | AS | AS | A.S. | | |
| Guam | Insular area (Territory) | GU GUM 316 US-GU | GU | 66 | GU | GU | Guam | | |
| Northern Mariana Islands | Insular area (Commonwealth) | MP MNP 580 US-MP | MP | 69 | MP | CM | M.P. | | CNMI |
| Puerto Rico | Insular area (Commonwealth) | PR PRI 630 US-PR | PR | 72 | PR | PR | P.R. | | |
| U.S. Virgin Islands | Insular area (Territory) | VI VIR 850 US-VI | VI | 78 | VI | VI | V.I. | | U.S.V.I. |
| U.S. Minor Outlying Islands | Insular areas | UM UMI 581 US-UM | UM | 74 | UM | | | |
| Baker Island | Island | UM-81 | | 81 | | | | | XB |
| Howland Island | Island | UM-84 | | 84 | | | | | XH |
| Jarvis Island | Island | UM-86 | | 86 | | | | | XQ |
| Johnston Atoll | Atoll | UM-67 | | 67 | | | | | XU |
| Kingman Reef | Atoll | UM-89 | | 89 | | | | | XM |
| Midway Atoll | Atoll | UM-71 | | 71 | | | | | QM |
| Navassa Island | Island | UM-76 | | 76 | | | | | XV |
| Palmyra Atoll | Atoll | UM-95 | | 95 | | | | | XL |
| Wake Island | Atoll | UM-79 | | 79 | | | | | QW |
| Marshall Islands | Freely associated state | MH MHL 584 | MH | 68 | MH | | | | |
| Micronesia | Freely associated state | FM FSM 583 | FM | 64 | FM | | | | |
| Palau | Freely associated state | PW PLW 585 | PW | 70 | PW | | | | |
| U.S. Armed Forces – Americas | US military mail code | | | | AA | | | | |
| U.S. Armed Forces – Europe | US military mail code | | | | AE | | | | |
| U.S. Armed Forces – Pacific | US military mail code | | | | AP | | | | |
| Nebraska | Obsolete postal code | | | | NB | | | | |
| Northern Mariana Islands | Obsolete postal code | | | | CM | | | | |
| Panama Canal Zone | Obsolete postal code | PZ PCZ 594 | | | CZ | | | | |
| Philippine Islands | Obsolete postal code | PH PHL 608 | | | PI | | | | |
| Trust Territory of the Pacific Islands | Obsolete postal code | PC PCI 582 | | | TT | | | | |

## History

As early as October 1831, the United States Postal Service recognized common abbreviations for states and territories. However, they accepted these abbreviations only because of their popularity, preferring that patrons spell names out in full to avoid confusion.
The traditional abbreviations for U.S. states and territories, widely used in mailing addresses prior to the introduction of two-letter U.S. postal abbreviations, are still commonly used for other purposes (such as legal citation), and are still recognized (though discouraged) by the Postal Service.
Modern two-letter abbreviated codes for the states and territories originated in October 1963, with the issuance of Publication 59: Abbreviations for Use with ZIP Code, three months after the Post Office introduced ZIP codes in July 1963. The purpose, rather than to standardize state abbreviations per se, was to make room in a line of no more than 23 characters for the city, the state, and the ZIP code.
Since 1963, only one state abbreviation has changed. Originally Nebraska was "NB"; but, in November 1969, the Post Office changed it to "NE" to avoid confusion with New Brunswick in Canada.
Prior to 1987, when the U.S. Secretary of Commerce approved the two-letter codes for use in government documents, the United States Government Printing Office (GPO) suggested its own set of abbreviations, with some states left unabbreviated. Today, the GPO supports United States Postal Service standard.

### Current use of traditional abbreviations

Legal citation manuals, such as The Bluebook and The ALWD Citation Manual, typically use the "traditional abbreviations" or variants thereof.

## Codes for states and territories
### ISO standard 3166

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.

### ANSI standard INCITS 38:2009

The American National Standards Institute (ANSI) established alphabetic and numeric codes for each state and outlying areas in ANSI standard INCITS 38:2009. ANSI standard INCITS 38:2009 replaced the Federal Information Processing Standard (FIPS) standards FIPS 5-2, FIPS 6-4, and FIPS 10-4. The ANSI alphabetic state code is the same as the USPS state code except for U.S. Minor Outlying Islands, which have an ANSI code "UM" but no USPS code—and U.S. Military Mail locations, which have USPS codes ("AA", "AE", "AP") but no ANSI code.

### Postal codes

The United States Postal Service (USPS) has established a set of uppercase abbreviations to help process mail with optical character recognition and other automated equipment. There are also official USPS abbreviations for other parts of the address, such as street designators (street, avenue, road, etc.).
These two-letter codes are distinguished from traditional abbreviations such as Calif., Fla., or Tex. The Associated Press Stylebook states that in contexts other than mailing addresses, the traditional state abbreviations should be used. However, the Chicago Manual of Style now recommends use of the uppercase two-letter abbreviations, with the traditional forms as an option.
The postal abbreviation is the same as the ISO 3166-2 subdivision code for each of the fifty states.
These codes do not overlap with the 13 Canadian subnational postal abbreviations. The code for Nebraska changed from NB to NE in November 1969 to avoid a conflict with New Brunswick. Canada likewise chose MB for Manitoba to prevent conflict with either Massachusetts (MA), Michigan (MI), Minnesota (MN), Missouri (MO), or Montana (MT).

### Coast Guard vessel prefixes

The U.S. Coast Guard (USCG) uses a set of two-letter prefixes for vessel numbers; 39 states and the District of Columbia have the same USPS and USCG abbreviations. USCG prefixes have also been established for five outlying territories; all are the same as the USPS abbreviations except the Mariana Islands. The twelve cases where USPS and USCG abbreviations differ are listed below and marked in bold red in the table above; they include three inland states with a small Coast Guard contingent. These twelve abbreviations were changed to avoid conflicting with the ISO 3166 two-digit country codes.
Mismatched USPS and USCG state codes :
| State | USPS Code | USCG Code |
| California | CA | CF |
| Colorado | CO | CL |
| Delaware | DE | DL |
| Hawaii | HI | HA |
| Kansas | KS | KA |
| Michigan | MI | MC |
| Mississippi | MS | MI |
| Massachusetts | MA | MS |
| Nebraska | NE | NB |
| Washington | WA | WN |
| Wisconsin | WI | WS |
| Mariana Islands | MP | CM |