| Code | Name | Region |
|---|---|---|
| USPX6 | Paxico | KS |
| USPXS | Paxinos | PA |
| USP7A | Patterson | AR |
| USPCQ | Patterson | CA |
| USGPO | Patterson | GA |
| USZPA | Patterson | LA |
| USPNQ | Patterson | NC |
| USPAN | Patterson | NY |
| USPT2 | Patterson | WA |
| USDPS | Pattison | TX |
| USVQW | Patton | CA |
| USJZP | Patton | MO |
| USIQP | Pattonsburg | MO |
| USNHK | Patuxent River | MD |
| USPAZ | Paul | ID |
| USPD6 | Paulden | AZ |
| USPAD | Paulding | OH |
| USPUE | Pauline | KS |
| USZUI | Pauline | SC |
| US9AU | Paullina | IA |
| USKPH | Pauloff Harbor | AK |
| USPGL | Pascagoula | MS |
| USPSC | Pasco | WA |
| USPXC | Pascoag | RI |
| USPRB | Paso Robles | CA |
| USPCM | Pass Christian | MS |
| USP8A | Passadumkeag | ME |
| USPSE | Passaic | NJ |
| USAKL | Pataskala | OH |
| USPCP | Patchogue | NY |
| US5LT | Patel | MS |
| USXKT | Pateros | WA |
| USPAT | Paterson | NJ |
| USPWG | Paterson | WA |
| USP5K | Patoka | IL |
| USPXK | Patoka | IN |
| USPQB | Paton | IA |
| USPZK | Patrick | NV |
| USJKR | Patrick Springs | VA |
| USQPI | Patriot | OH |
| USPQZ | Patten | ME |
| USQRA | Parma | MO |
| USPBH | Parma | OH |
| USUVP | Parnassus | PA |
| USPN7 | Parnell | IA |
| USPXA | Paron | AR |
| USPWB | Parowan | UT |
| USXKL | Parris Island | SC |
| USRRH | Parrish | AL |
| US8RW | Parrish | FL |