| Port Code | Port Name | Country |
| USPKL | Pulaski | United States |
| USPKM | Pocomoke City | United States |
| USPKN | Pedricktown | United States |
| USPKO | Pandora | United States |
| USPKP | Parkesburg | United States |
| USPKS | Perkasie | United States |
| USPKT | Parkton | United States |
| USPKU | Piketon | United States |
| USPKV | Spokane Valley | United States |
| USPKW | Parker | United States |
| USPKX | Pekin | United States |
| USPKY | Parksley | United States |
| USPKZ | Parkrose | United States |
| USPLA | Palmerton | United States |
| USPLB | Plattsburgh | United States |
| USPLC | Pearl City (Oahu) | United States |
| USPLD | Poland Spring | United States |
| USPLE | Palatine | United States |
| USPLF | Plainfield | United States |
| USPLG | Plaines | United States |
| USPLH | Plymouth | United States |
| USPLI | Plainfield | United States |
| USPLK | Branson | United States |
| USPLL | Pt Allen | United States |
| USPLM | Palm Coast | United States |
| USPLN | Pineland | United States |
| USPLO | Platteville | United States |
| USPLP | Pleasant Prairie | United States |
| USPLQ | Plaquemine | United States |
| USPLR | Pell City | United States |
| USPLS | Plains | United States |
| USPLT | Palatka | United States |
| USPLU | Pt Ludlow | United States |
| USPLV | Port Lavaca | United States |
| USPLW | Plover | United States |
| USPLX | Plain City | United States |
| USPLY | Plymouth | United States |
| USPLZ | Plano | United States |
| USPMA | Pomona | United States |
| USPMB | Pembina | United States |
| USPMC | Pineville | United States |
| USPMD | Palm Desert | United States |
| USPME | Port Manatee | United States |
| USPMF | Plymouth | United States |
| USPMG | Palm Beach Gardens | United States |
| USPMH | Portsmouth | United States |
| USPMI | Palm City | United States |
| USPMJ | Pompton Plains | United States |
| USPMK | Potomac | United States |
| USPML | Pt Moller | United States |
| USPMM | Plymouth Meeting | United States |
| USPMN | Pitman | United States |
| USPMQ | Paramount | United States |
| USPMR | Palmyra | United States |
| USPMS | Lemasters | United States |
| USPMT | Palmetto | United States |
| USPMU | Paimiut | United States |
| USPMW | Plymouth | United States |
| USPMX | Palmer | United States |
| USPMY | Plymouth | United States |
| USPMZ | Palmertown | United States |
| USPNA | Pinedale | United States |
| USPNC | Ponca City | United States |
| USPND | Pearland | United States |
| USPNE | Philadelphia North East Apt | United States |
| USPNF | Peterson's Point | United States |
| USPNH | Pine Hall | United States |
| USPNI | Pine Island | United States |
| USPNJ | Pt Newark | United States |
| USPNK | Princeton | United States |
| USPNL | Pinedale | United States |
| USPNM | Fennimore | United States |
| USPNN | Princeton | United States |
| USPNO | Plano | United States |
| USPNP | Pentwater | United States |
| USPNQ | Patterson | United States |
| USPNR | Penn Run | United States |
| USPNS | Pensacola | United States |
| USPNT | Piedmont | United States |
| USPNU | Panguitch | United States |
| USPNV | Pineville | United States |
| USPNW | Plainwell | United States |
| USPNX | Sherman-Denison | United States |
| USPNY | Pine City | United States |
| USPOA | Pt Arthur | United States |
| USPOB | Pt Bolivar | United States |
| USPOC | La Verne | United States |
| USPOD | Porterdale | United States |
| USPOE | Fort Polk | United States |
| USPOF | Poplar Bluff | United States |
| USPOG | Pottersburg | United States |
| USPOH | Pocahontas | United States |
| USPOI | Pontiac | United States |
| USPOJ | Portage | United States |
| USPOK | Pontotoc | United States |
| USPOL | Portland | United States |
| USPOM | Portsmouth | United States |
| USPON | Pt Neches | United States |
| USPOO | Polo | United States |
| USPOP | Prospect | United States |