| Code | Name | Region |
|---|---|---|
| USDXN | Dixon | IL |
| USKDX | Dixon | KY |
| USDIQ | Dixon | MO |
| US3DX | Dixville Notch | NH |
| USDB4 | Dobbins | CA |
| USDBF | Dobbs Ferry | NY |
| USDOB | Dobson | NC |
| USDDG | Dodge | NE |
| USXEU | Dodge Center | MN |
| USDDC | Dodge City | KS |
| USDDV | Dodgeville | WI |
| USDS4 | Dodson | LA |
| USDOE | Doe Run | KY |
| USDU9 | Doerun | GA |
| USQDY | Dolgeville | NY |
| USDXY | Dollar Bay | MI |
| USDLO | Dolomi | AK |
| USDOL | Dolomite | AL |
| USZDE | Dolores | CO |
| USDQN | Dolton | IL |
| USDML | Dimondale | MI |
| USDFP | Dingmans Ferry | PA |
| USDIU | Dinuba | CA |
| USD3D | Dinwiddie | VA |
| USDIO | Diomede Island | AK |
| USDG9 | Dirggs | ID |
| USDYY | Discovery Bay | CA |
| USDPV | Disputanta | VA |
| USJHO | District Heights | MD |
| US4DV | Divernon | IL |
| USDV5 | Divide | CO |
| US7DI | Dix | IL |
| USYIX | Dix | NE |
| USDI7 | Dix Hills | NY |
| USDXF | Dixfield | ME |
| USIXE | Dixie | GA |
| USEXX | Dixie | LA |
| USD9I | Dixmont | ME |
| USDMR | Dixmoor | IL |
| USDXC | Dixon | CA |
| USDSY | Dickson City | PA |
| USDKS | Dierks | AR |
| USD2H | Dieterich | IL |
| USD3G | Diggs | VA |
| USDGT | Dighton | MA |
| USDKE | Dike | IA |
| USDCY | Dill City | OK |
| USDY3 | Dilley | TX |
| USDLG | Dillingham | AK |
| US4DI | Dillon | CO |