| Oberburg | SLO Gorni Grad | ||
| Ober-Eisternitz | CZ Horni Vestonice | ||
| Ober-Gerspitz | CZ Horni Herspice | ||
| Ober-Leutensdorf | CZ Litvinov | ||
| Oberjosefsdorf | YU Josipovac | ||
| Oberplan | CZ Horni Plana | ||
| Ober-Sandau | CZ Horny Zandov | ||
| Oberschönborn | UKR | ||
| Ober-Tannowitz | CZ Horni Dunajovice | ||
| Obrowitz | CZ Zabrdovice | ||
| Ocker | LV Ogre | ||
| Odenpäh | EE Odenpäh | ||
| Oderberg | PL Bohumin | ||
| Oedenburg | H Sopron | ||
| Oels | PL Olesnica | ||
| Oesterwiek | UKR Dolinskoje | ||
| Ohlau | PL Olawa | ||
| Ohwala | H Ofalu | ||
| Olberndorf | CZ Hradek nad Nisou | ||
| Oppeln | PL Opole | ||
| Orloff | PL Orlowo | ||
| Ortelsburg | PL Szczytno | ||
| Osterode | PL Ostroda | ||
| Osterode | PL Ostroda | ||
| Ottmachau | PL Otmuchow | ||
| Palmnicken | RUS Jantarnyi | ||
| Pantschowa | YU Pancevo | ||
| Pardorf | CZ Barovy | ||
| Parnehnen | RUS Krasnyi Jar | ||
| Parschau | PL Parszewo | ||
| Passenheim | PL Pasym | ||
| Paterswalde | RUS Bolschaja Poljana | ||
| Pauschung | UKR | ||
| Pausram | CZ Pouzdrany | ||
| Peitschendorf | PL Piecki | ||
| Perlak | YU Prelog | ||
| Pernau | EE Pärnu | ||
| Perterswaldau | PL Pieszyce | ||
| Peterswalde | RUS Bolsana Poljana | ||
| Pettau | SLO Ptuj | ||
| Pfefferfeld | R Baia Borsa | ||
| Pförten | PL Brody | ||
| Philipshütten | CZ Filipova Hut | ||
| Pilgram | CZ Pelchrimov | ||
| Pillau | RUS Baltijsk | ||
| Pillkallen>Schloßberg | RUS Dobrowolsk | ||
| Pillkoppen | RUS Morskoje | ||
| Pilsen | CZ Plzen | ||
| Pleißen | CZ Plesna | ||
| Pleskau | RUS Pskow | ||
| Podersam | CZ Podborany | ||
| Pölitz | PL Police | ||
| Pörschken | RUS Nowo Moskowskoje | ||
| Pohrlitz | CZ Pohorelice | ||
| Pollau | CZ Palan | ||
| Pollau | CZ Pavlov | ||
| Ponewesch | LT Panevezys | ||
| Popelken>Markthausen | RUS Wyssokoe | ||
| Poplitten | RUS Nowo Moskowskoje | ||
| Poppitz | CZ Popovice | ||
| Posen | PL Poznan | ||
| Postelberg | CZ Postoloprty | ||
| Prag | CZ Praha | ||
| Pragerhof | SLO Pragersko | ||
| Prahlitz | CZ Pravlov | ||
| Prebischtor | CZ Pravcicka Brans | ||
| Pregel | RUS Progolja | ||
| Prerau | CZ Prerov | ||
| Preschau | SK Presov | ||
| Preußisch Eylau | RUS Bagrationowsk | ||
| Preußisch Holland | PL Paslek | ||
| Preßburg | SK Prezburek->Bratislava | H Pozsony | |
| Priesenitz | CZ Prizrenice | ||
| Prittlach | CZ Pritluky | ||
| Privitz | H Privigye | ||
| Probstberg | PL Wyszkow | ||
| Pronitten | RUS Slawjanskoje | ||
| Proskau | PL Proszkow | ||
| Proßnitz | CZ Prostejov | ||
| Preußisch Eylau | RUS Bagrationowsk | ||
| Prävali | SLO Prevalje | ||
| Prösau | CZ Brezova | ||
| Pssessern => Großgarten | |||
| Pulverkrug | PL Prochowiez | ||
| Puppen | PL Spychowo | ||
| Putzig | PL Puckij | ||
| Pyritz | PL Pyrzyce | ||
| Quartschen | PL Chwarszczany | ||
| Quitteinen | PL Kwitajny |