ISO 3166-2 subcodes.
| AK | Alaska | State |
| AL | Alabama | State |
| AR | Arkansas | State |
| AS | American Samoa | Territory |
| AZ | Arizona | State |
| CA | California | State |
| CO | Colorado | State |
| CT | Connecticut | State |
| DC | District of Columbia | District |
| DE | Delaware | State |
| FL | Florida | State |
| GA | Georgia | State |
| GU | Guam | Territory |
| HI | Hawaii | State |
| IA | Iowa | State |
| ID | Idaho | State |
| IL | Illinois | State |
| IN | Indiana | State |
| KS | Kansas | State |
| KY | Kentucky | Commonwealth |
| LA | Louisiana | State |
| MA | Massachusetts | Commonwealth |
| MD | Maryland | State |
| ME | Maine | State |
| MI | Michigan | State |
| MN | Minnesota | State |
| MO | Missouri | State |
| MP | Northern Mariana Islands | Commonwealth |
| MS | Mississippi | State |
| MT | Montana | State |
| NC | North Carolina | State |
| ND | North Dakota | State |
| NE | Nebraska | State |
| NH | New Hampshire | State |
| NJ | New Jersey | State |
| NM | New Mexico | State |
| NV | Nevada | State |
| NY | New York | State |
| OH | Ohio | State |
| OK | Oklahoma | State |
| OR | Oregon | State |
| PA | Pennsylvania | Commonwealth |
| PR | Puerto Rico | Commonwealth |
| RI | Rhode Island | State |
| SC | South Carolina | State |
| SD | South Dakota | State |
| TN | Tennessee | State |
| TX | Texas | State |
| UT | Utah | State |
| VA | Virginia | Commonwealth |
| VI | United States Virgin Islands | Territory |
| VT | Vermont | State |
| WA | Washington | State |
| WI | Wisconsin | State |
| WV | West Virginia | State |
| WY | Wyoming | State |
