Klasa B
| Country | Poland |
|---|---|
| Confederation | UEFA |
| Number of clubs | 1000+ (in 2020–21) |
| Level on pyramid | 8/9 |
| Promotion to | Klasa A |
| Relegation to | Klasa C |
| Domestic cup(s) | Polish Cup |
Klasa B represents the eighth (or ninth in some regions) level of the Polish football hierarchy. Teams promoted from Klasa B move up to Klasa A, whilst relegated teams descend to the Klasa C leagues (where the latter league exists).