| Code | Name | Region |
|---|---|---|
| PLKYO | Krzyzanow | 10 |
| PLKWO | Ksawerow | 10 |
| PLMQ4 | Ksiaz Wielki | 12 |
| PLOYC | Ksiaz Wielkopolsk | WP |
| PLKCL | Kucelinska | |
| PLKBO | Kuczbork-osada | 14 |
| PLKDZ | Kudowa-zdroj | 2 |
| PLOZY | Kukinia | 32 |
| PLOYD | Kulesze Koscielne | PD |
| PLKCI | Kunice | 8 |
| PLKPN | Kupienino | LB |
| PLKOW | Kurow | 6 |
| PLKUW | Kurylowka | 18 |
| PLKZT | Kurzetnik | 28 |
| PLKUE | Kurznie | |
| PLKNC | Krosnice | 2 |
| PLLRK | Krosniewice | LD |
| PLKRO | Krosno | 18 |
| PLKOD | Krosno Odrzanskie | 8 |
| PLKRN | Krotoszyn | 30 |
| PLKMN | Krupsky Mlyn | 24 |
| PLOYF | Kruszow | LD |
| PLKZI | Kruszwica | 4 |
| PLKUS | Kruszyn | 2 |
| PLKRY | Krynica | 12 |
| PLKMR | Krynica Morska | 28 |
| PLKRM | Krynica Morska | PM |
| PLK2A | Krzemienica | 18 |
| PLKEM | Krzemieniewo | 30 |
| PLKUP | Krzesimow | 6 |
| PLKKN | Krzesk Krolowa Niwa | 14 |
| PLKZW | Krzeszow | 2 |
| PLKZC | Krzeszowice | 12 |
| PLKRE | Krzewie | LD |
| PLKYM | Krzymow | WP |
| PLKZL | Kozietuly | 14 |
| PLKZN | Kozmin, Krotoszyn | WP |
| PLKZM | Kozminiec | 30 |
| PLKZU | Kozuchow | 8 |
| PLKOZ | Kozy | |
| PLKRK | Krakow | |
| PLKMK | Kramsk | 30 |
| PLKKE | Krapkowice | |
| PLKPW | Kraplewo | 30 |
| PLKAS | Krasiniec | 14 |
| PL8KP | Krasne | 18 |
| PLKRS | Krasnik | 6 |
| PLKNL | Krasnosielc | 14 |
| PLKRA | Krasnystaw | |
| PLKCN | Krasocin |