Kody pocztowe 11-xxx
50 kodów pocztowych zaczynających się od 11. Obszar: Giżycko, Mrągowo, Bartoszyce, Barczewo, Biskupiec.
| Kod | Poczta | Miejscowości | Adresy |
|---|---|---|---|
| 11-001 | Dywity | 17 | 3434 |
| 11-008 | Świątki | 21 | 858 |
| 11-010 | Barczewo | 54 | 4305 |
| 11-015 | Olsztynek | 67 | 3640 |
| 11-030 | Purda | 28 | 1494 |
| 11-034 | Stawiguda | 13 | 3079 |
| 11-036 | Sząbruk | 35 | 2715 |
| 11-040 | Dobre Miasto | 23 | 3007 |
| 11-041 | Olsztyn | 7 | 2166 |
| 11-042 | Jonkowo | 23 | 1662 |
| 11-048 | Jonkowo | 1 | 498 |
| 11-100 | Lidzbark Warmiński | 54 | 3815 |
| 11-102 | Blanki | 1 | 1 |
| 11-103 | Rogóż | 1 | 1 |
| 11-106 | Żegoty | 19 | 843 |
| 11-130 | Orneta | 26 | 1995 |
| 11-135 | Lubomino | 21 | 919 |
| 11-200 | Bartoszyce | 106 | 4948 |
| 11-201 | Bartoszyce | 1 | 1 |
| 11-204 | Bartoszyce | 1 | 1 |
| 11-205 | Bartoszyce | 1 | 1 |
| 11-206 | Bartoszyce | 1 | 1 |
| 11-210 | Sępopol | 48 | 1392 |
| 11-220 | Górowo Iławeckie | 66 | 2042 |
| 11-230 | Bisztynek | 30 | 1153 |
| 11-300 | Biskupiec | 52 | 3832 |
| 11-304 | Rzeczenica | 1 | 1 |
| 11-311 | Lutry | 21 | 903 |
| 11-320 | Jeziorany | 26 | 1645 |
| 11-400 | Kętrzyn | 71 | 3806 |
| 11-402 | Kętrzyn | 1 | 1 |
| 11-405 | Nakomiady | 1 | 1 |
| 11-409 | Kętrzyn | 1 | 1 |
| 11-410 | Barciany | 71 | 1105 |
| 11-420 | Srokowo | 55 | 847 |
| 11-430 | Korsze | 64 | 1418 |
| 11-440 | Reszel | 46 | 1555 |
| 11-441 | Wilkowo | 1 | 1 |
| 11-500 | Giżycko | 42 | 5823 |
| 11-510 | Wydminy | 36 | 1541 |
| 11-513 | Rydzewo | 24 | 1565 |
| 11-520 | Ryn | 33 | 1410 |
| 11-600 | Węgorzewo | 50 | 3141 |
| 11-606 | Budry | 26 | 796 |
| 11-610 | Pozezdrze | 16 | 1164 |
| 11-612 | Kruklanki | 24 | 1077 |
| 11-700 | Mrągowo | 66 | 5295 |
| 11-710 | Piecki | 51 | 2111 |
| 11-730 | Mikołajki | 33 | 2084 |
| 11-731 | Borowe | 34 | 1338 |