K
- Kamienna Góra – Lower Silesian Voivodeship
- Karpniki – Lower Silesian Voivodeship
- Kazimierz Dolny – Lublin Voivodeship
- Kąty Wrocławskie – Lower Silesian Voivodeship
- Kętrzyn – Warmian-Masurian Voivodeship
- Kliczków – Lower Silesian Voivodeship
- Kliczków Mały – Łódź Voivodeship
- Kłaczyna – Lower Silesian Voivodeship
- Kłodzko – Lower Silesian Voivodeship
- Kowal – Kuyavian-Pomeranian Voivodeship
- Koło – Greater Poland Voivodeship
- Konary – Świętokrzyskie Voivodeship
- Korzkiew – Lesser Poland Voivodeship
- Koziegłowy – Silesian Voivodeship
- Kożuchów – Lubusz Voivodeship
- Koźmin Wielkopolski
- Kraków - Wawel Castle
- Krasiczyn – Subcarpathian Voivodeship
- Krasnystaw – Lublin Voivodeship
- Krosno Odrzańskie – Lower Silesian Voivodeship
- Krupe Castle – Lublin Voivodeship
- Kryłów - Lublin Voivodeship
- Kruszwica – Kuyavian-Pomeranian Voivodeship
- Książ – Lower Silesian Voivodeship
- Kunowa – Subcarpathian Voivodeship
- Kwidzyn – Pomeranian Voivodeship
Read more about this topic: List Of Castles In Poland