S
- Sanok – Subcarpathian Voivodeship
- Sianów – West Pomeranian Voivodeship
- Siewierz – Silesian Voivodeship
- Siedlęcin – Lower Silesian Voivodeship
- Sielecki Castle
- Skępe – Kuyavian-Pomeranian Voivodeship
- Skierbieszów – Lublin Voivodeship
- Smolajny – Warmian-Masurian Voivodeship
- Smoleń – Silesian Voivodeship
- Sobieszów (Chojnik) – Lower Silesian Voivodeship
- Spycimierz – Łódź Voivodeship
- Stary Dzierzgoń – Pomeranian Voivodeship
- Stołpie – Lublin Voivodeship
- Strzegom – Lower Silesian Voivodeship
- Strzygi – Kuyavian-Pomeranian Voivodeship
- Suchań – West Pomeranian Voivodeship
- Susiec – Lublin Voivodeship
- Syców – Lower Silesian Voivodeship
- Szczytna – Lower Silesian Voivodeship
- Szprotawa – Lower Silesian Voivodeship
- Szydłowiec
- Szydłów – Świętokrzyskie Voivodeship
- Szymbark – Lesser Poland Voivodeship
Read more about this topic: List Of Castles In Poland