Bielsk

Bielsk may refer to:

• Bielsk, Kuyavian-Pomeranian Voivodeship (north-central Poland)
• Bielsk, Masovian Voivodeship (east-central Poland)
• Bielsk Podlaski in Podlaskie Voivodeship (north-east Poland)
• Bielsk, Pomeranian Voivodeship (north Poland)
• Bielsk County, an administrative district whose seat is Bielsk Podlaski
• Gmina Bielsk Podlaski, an administrative district within Bielsk County
• Gmina Bielsk, an administrative district whose seat is Bielsk, Masovian Voivodeship