| City/Town | District (Kreis) | Pop. in 1939 [1] | Current name | Current country | Current administrative unit |
|---|
| Allenburg | Landkreis Wehlau | 2 694 | Druzhba | Russia | Kaliningrad Oblast |
| Allenstein | Landkreis Allenstein | 50 396 | Olsztyn | Poland | Warmian-Masurian Voivodeship |
| Angerburg | Landkreis Angerburg | 10 922 | Węgorzewo (Węgobork) | Poland | Warmian-Masurian Voivodeship |
| Arys | Landkreis Johannisburg | 3 553 | Orzysz | Poland | Warmian-Masurian Voivodeship |
| Barten | Landkreis-Rastenburg | 1 541 | Barciany | Poland | Warmian-Masurian Voivodeship |
| Bartenstein | Landkreis Bartenstein | 12 912 | Bartoszyce | Poland | Warmian-Masurian Voivodeship |
| Bischofsburg | Landkreis Rößel | 8 463 | Biskupiec | Poland | Warmian-Masurian Voivodeship |
| Bischofstein (Ostpreußen) | Rößel | 3 163 | Bisztynek | Poland | Warmian-Masurian Voivodeship |
| Braunsberg | Landkreis Braunsberg | 21 142 | Braniewo | Poland | Warmian-Masurian Voivodeship |
| Bugmünde | Plöhnen | 10 026 | Nowy Dwór Mazowiecki | Poland | Masovian Voivodeship |
| Chorzellen | Praschnitz | 4 000 | Chorzele | Poland | Masovian Voivodeship |
| Darkehmen/Angerapp | Landkreis Darkehmen | | Ozyorsk | Russia | Kaliningrad Oblast |
| Domnau | Bartenstein | | Domnovo | Russia | Kaliningrad Oblast |
| Elbing | Stadtkreis | 85 952 | Elbląg | Poland | Warmian-Masurian Voivodeship |
| Eydtkuhnen | Landkreis Stallupönen | 4 922 | Chernyshevskoye | Russia | Kaliningrad Oblast |
| Fischhausen | Landkreis Samland | 3 879 | Primorsk | Russia | Kaliningrad Oblast |
| Frauenburg (Ostpreußen) | Braunsberg | 2 951 | Frombork | Poland | Warmian-Masurian Voivodeship |
| Friedland (Ostpreußen) | Bartenstein | | Pravdinsk | Russia | Kaliningrad Oblast |
| Gehlenburg | Johannisburg | 2 623 | Biała Piska | Poland | Warmian-Masurian Voivodeship |
| Gerdauen | Landkreis Gerdauen | 5 118 | Zheleznodorozhny | Russia | Kaliningrad Oblast |
| Gilgenburg | Landkreis Osterode | 1 700 | Dąbrówno | Poland | Warmian-Masurian Voivodeship |
| Goldap | Landkreis Goldap | 12 786 | Gołdap | Poland | Warmian-Masurian Voivodeship |
| Görtzen | Sichelberg | 1 994 | Żuromin | Poland | Masovian Voivodeship |
| Gumbinnen | Landkreis Gumbinnen | 24 534 | Gusev | Russia | Kaliningrad Oblast |
| Guttstadt | Landkreis Heilsberg | 5 932 | Dobre Miasto | Poland | Warmian-Masurian Voivodeship |
| Harnau | Sichelberg | 4 786 | Raciąż | Poland | Masovian Voivodeship |
| Heiligenbeil | Landkreis Heiligenbeil | 12 100 | Mamonovo | Russia | Kaliningrad Oblast |
| Heilsberg | Heilsberg | 11 787 | Lidzbark Warmiński | Poland | Warmian-Masurian Voivodeship |
| Heydekrug | Landkreis Heydekrug | 4 836 | Šilutė | Lithuania | Klaipėda County |
| Hohenburg | Schröttersburg | 4 787 | Wyszogród | Poland | Masovian Voivodeship |
| Hohenstein | Osterode | 4 245 | Olsztynek | Poland | Warmian-Masurian Voivodeship |
| Insterburg | Landkreis Insterburg | 48 711 | Chernyakhovsk | Russia | Kaliningrad Oblast |
| Johannisburg | Johannisburg | 6 322 | Pisz (Jańsbork) | Poland | Warmian-Masurian Voivodeship |
| Königsberg (Preußen) | Stadtkreis | 372 000 | Kaliningrad | Russia | Kaliningrad Oblast |
| Kreuzburg (Ostpreußen) | Landkreis Preußisch Eylau | | Slavskoye | Russia | Kaliningrad Oblast |
| Labiau | Landkreis Labiau | 6 527 | Polessk | Russia | Kaliningrad Oblast |
| Landsberg in Ostpreußen | Preußisch Eylau | 3 120 | Górowo Iławeckie | Poland | Warmian-Masurian Voivodeship |
| Liebemühl | Osterode | 2 434 | Miłomłyn | Poland | Warmian-Masurian Voivodeship |
| Liebstadt | Landkreis Mohrungen | 2 742 | Miłakowo | Poland | Warmian-Masurian Voivodeship |
| Lötzen | Landkreis Lötzen | 16 288 | Giżycko (Lec) | Poland | Warmian-Masurian Voivodeship |
| Lyck | Landkreis Lyck | 16 482 | Ełk | Poland | Warmian-Masurian Voivodeship |
| Mackeim | Mackeim | 7 000 | Maków Mazowiecki | Poland | Masovian Voivodeship |
| Marggrabowa/Treuburg | Landkreis Oletzko/Treuburg | 7 114 | Olecko | Poland | Warmian-Masurian Voivodeship |
| Marienburg in Westpreußen | Landkreis Marienburg (Westpr.) | 27 318 | Malbork | Poland | Pomeranian Voivodeship |
| Mehlsack | Braunsberg | 4 393 | Pieniężno (Melzak) | Poland | Warmian-Masurian Voivodeship |
| Memel | Stadtkreis | 41 297 | Klaipėda | Lithuania | Klaipėda County |
| Mohrungen | Mohrungen | 5 500 | Morąg | Poland | Warmian-Masurian Voivodeship |
| Mielau | Mielau | 19 900 | Mława | Poland | Masovian Voivodeship |
| Mühlhausen (Ostpreußen) | Landkreis Preußisch Holland | 3 008 | Młynary | Poland | Warmian-Masurian Voivodeship |
| Nasielsk | Ostenburg | 7 365 | Nasielsk | Poland | Masovian Voivodeship |
| Neidenburg | Landkreis Neidenburg | 9 201 | Nidzica (Nibork) | Poland | Warmian-Masurian Voivodeship |
| Nikolaiken | Landkreis Sensburg | 2 627 | Mikołajki | Poland | Warmian-Masurian Voivodeship |
| Nordenburg | Gerdauen | 3 173 | Krylovo | Russia | Kaliningrad Oblast |
| Ortelsburg | Landkreis Ortelsburg | 14 234 | Szczytno | Poland | Warmian-Masurian Voivodeship |
| Ostenburg | Ostenburg | 17 401 | Pułtusk | Poland | Masovian Voivodeship |
| Osterode (Ostpreußen) | Osterode | 19 519 | Ostróda | Poland | Warmian-Masurian Voivodeship |
| Passenheim | Ortelsburg | 2 431 | Pasym | Poland | Warmian-Masurian Voivodeship |
| Pillau | Samland | 12 000 | Baltiysk | Russia | Kaliningrad Oblast |
| Plöhnen | Plöhnen | 12 000 | Płońsk | Poland | Masovian Voivodeship |
| Praschnitz | Praschnitz | 7 856 | Przasnysz | Poland | Masovian Voivodeship |
| Preußisch Eylau | Preußisch Eylau | 7 485 | Bagrationovsk | Russia | Kaliningrad Oblast |
| Preußisch Holland | Preußisch Holland | 6 345 | Pasłęk | Poland | Warmian-Masurian Voivodeship |
| Ragnit | Landkreis Tilsit-Ragnit | 10 094 | Neman | Russia | Kaliningrad Oblast |
| Rastenburg | Rastenburg | 19 634 | Kętrzyn (Rastembork) | Poland | Warmian-Masurian Voivodeship |
| Rhein (Ostpreußen) | Lötzen | 2 429 | Ryn | Poland | Warmian-Masurian Voivodeship |
| Rößel | Rößel | 5 000 | Reszel | Poland | Warmian-Masurian Voivodeship |
| Rozan | Mackeim | 4 876 | Różan | Poland | Masovian Voivodeship |
| Saalfeld | Mohrungen | 3 120 | Zalewo | Poland | Warmian-Masurian Voivodeship |
| Scharfenwiese | Scharfenwiese | 15 000 | Ostrołęka | Poland | Masovian Voivodeship |
| Schippenbeil | Bartenstein | 3 434 | Sępopol | Poland | Warmian-Masurian Voivodeship |
| Schirwindt | Landkreis Pillkallen | | Kutuzovo | Russia | Kaliningrad Oblast |
| Pillkallen/Schlossberg | Pillkallen | | Dobrovolsk | Russia | Kaliningrad Oblast |
| Schröttersburg | Schröttersburg | 35 200 | Płock | Poland | Masovian Voivodeship |
| Seeburg | Rößel | 3 022 | Jeziorany (Zybork) | Poland | Warmian-Masurian Voivodeship |
| Sejny | Sudauen | 3 405 | Sejny | Poland | Podlaskie Voivodeship |
| Sensburg | Sensburg | 9 877 | Mrągowo (Żądzbork) | Poland | Warmian-Masurian Voivodeship |
| Serock | Ostenburg | 6 500 | Serock | Poland | Masovian Voivodeship |
| Sichelberg | Sichelberg | 13 000 | Sierpc | Poland | Masovian Voivodeship |
| Soldau | Neidenburg | 5 349 | Działdowo | Poland | Warmian-Masurian Voivodeship |
| Stallupönen | Stallupönen | 6 608 | Nesterov | Russia | Kaliningrad Oblast |
| Sudauen | Sudauen | 23 066 | Suwałki | Poland | Podlaskie Voivodeship |
| Tapiau | Wehlau | 9 272 | Gvardeysk | Russia | Kaliningrad Oblast |
| Tilsit | Stadtkreis | 59 105 | Sovetsk | Russia | Kaliningrad Oblast |
| Wartenburg (Ostpreußen) | Allenstein | 5 841 | Barczewo (Wartembork) | Poland | Warmian-Masurian Voivodeship |
| Wehlau | Wehlau | 7 348 | Znamensk | Russia | Kaliningrad Oblast |
| Willenberg | Ortelsburg | 2 600 | Wielbark | Poland | Warmian-Masurian Voivodeship |
| Wormditt | Braunsberg | 7 817 | Orneta | Poland | Warmian-Masurian Voivodeship |
| Zakroczym | Plöhnen | 6 412 | Zakroczym | Poland | Masovian Voivodeship |
| Zichenau | Zichenau | 15 200 | Ciechanów | Poland | Masovian Voivodeship |
| Zinten | Heiligenbeil | | Kornevo | Russia | Kaliningrad Oblast |