| Code | Name | Region |
|---|---|---|
| PLKLS | Koluszki | 10 |
| PLWPK | Komorniki | WP |
| PLKMW | Komorow | 14 |
| PLKOM | Komorowice | 24 |
| PLKMO | Komorzno | 16 |
| PLKND | Kondratki | 20 |
| PLKNK | Koneck | 4 |
| PL6KP | Koniecpol Stary | 24 |
| PLKON | Konin | |
| PLKOI | Konopiska | SL |
| PLMK9 | Konotopa | 14 |
| PLKSE | Konskie | 26 |
| PLQWK | Konskowola | |
| PLOYU | Konstancin-jeziorna | MZ |
| PLKNS | Konstantcin | |
| PLKLK | Kluszkowce | 12 |
| PLKNU | Knurow | SL |
| PLOZV | Kobierno | WP |
| PLKYE | Kobierzyce | |
| PLKGA | Kobyla Gora | 30 |
| PLKLA | Kobylanka | |
| PLKBL | Kobylany | LU |
| PLKBY | Kobylin | 30 |
| PLKOA | Kobylka | |
| PLKOB | Kobylnica | 22 |
| PLKBN | Kobylnica | 30 |
| PLKCR | Kocierzew | 10 |
| PLK2B | Kodrab | 10 |
| PLKYL | Kolaczyce | 18 |
| PLKBS | Kolbaskowo | 32 |
| PLB8L | Kolbiel | 14 |
| PLOYA | Kolbudy Dolne | PM |
| PLKZA | Kolbuszowa | |
| PLKLG | Kolczyglowy | PM |
| PLKOE | Koleczkowo | PM |
| PLKSI | Kisielice | 28 |
| PLKIS | Kiszkowo | WP |
| PLMA9 | Klaj | 12 |
| PLKYD | Klaudyn | 14 |
| PLKKG | Klecza Gorna | 12 |
| PLKLL | Kleszczele | 20 |
| PLKZO | Kleszczewo | 30 |
| PLKLE | Kleszczow | 10 |
| PLKWN | Klewinowo | 20 |
| PLKLI | Klikawa | |
| PLKLW | Klimontow | 26 |
| PLKWK | Kliniska Wielkie | 32 |
| PLKBU | Klobuck | SL |
| PLOXF | Kloczew | LU |
| PLKLD | Klodawa | 30 |