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| Name | Entry in The World Factbook | |
| Port-au-Prince [US Embassy] | Haiti | |
| Port Louis [US Embassy] | Mauritius | |
| Port Moresby [US Embassy] | Papua New Guinea | |
| Porto Alegre [US Consulate] | Brazil | |
| Port-of-Spain [US Embassy] | Trinidad and Tobago | |
| Port Said [US Consular Agency] | Egypt | |
| Portuguese Guinea | Guinea-Bissau | |
| Portuguese Timor (East Timor) | Indonesia | |
| Poznan [US Consulate] | Poland | |
| Prague [US Embassy] | Czechoslovakia | |
| Praia [US Embassy] | Cape Verde | |
| Pretoria [US Embassy] | South Africa | |
| Pribilof Islands | United States | |
| Prince Edward Island | Canada | |
| Prince Edward Islands | South Africa | |
| Prince Patrick Island | Canada | |
| Principe | Sao Tome and Principe | |
| Puerto Plata [US Consular Agency] | Dominican Republic | |
| Puerto Vallarta [US Consular Agency] | Mexico | |
| Pusan [US Consulate] | South Korea | |
| P'yŏngyang | Korea, North | |
| Q | Quebec [US Consulate General] | Canada |
| Queen Charlotte Islands | Canada | |
| Queen Elizabeth Islands | Canada | |
| Queen Maud Land [claimed by Norway] | Antarctica | |
| Quito [US Embassy] | Ecuador | |
| R | Rabat [US Embassy] | Morocco |
| Ralik Chain | Marshall Islands | |
| Rangoon [US Embassy] | Burma | |
| Ratak Chain | Marshall Islands | |
| Recife [US Consulate] | Brazil | |
| Redonda | Antigua and Barbuda | |
| Red Sea | Indian Ocean | |
| Revillagigedo Island | United States | |
| Revillagigedo Islands | Mexico | |
| Reykjavik [US Embassy] | Iceland | |
| Rhodes | Greece | |
| Rhodesia | Zimbabwe | |
| Rhodesia, Northern | Zambia | |
| Rhodesia, Southern | Zimbabwe | |
| Rio de Janeiro [US Consulate General] | Brazil | |
| Río de Oro | Western Sahara | |
| Río Muni | Equatorial Guinea | |
| Riyadh [US Embassy] | Saudi Arabia | |
| Robinson Crusoe Island (Más a Tierra) | Chile | |
| Rocas, Atol das | Brazil | |
| Rockall [disputed] | United Kingdom | |
| Rodrigues | Mauritius | |
| Rome [US Embassy, US Mission to the UN Agencies for Food and Agriculture (FODAG)] | Italy | |
| Roncador Cay | Colombia | |
| Roosevelt Island | Antarctica | |
| Ross Dependency [claimed by New Zealand] | Antarctica | |
| Ross Island | Antarctica | |
| Ross Sea | Antarctica | |
| Rota | Northern Mariana Islands | |
| Rotuma | Fiji | |
| Ryukyu Islands | Japan | |
| S | Saba | Netherlands Antilles |
| Sabah | Malaysia | |
| Sable Island | Canada |
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