III liga
| Organising body | PZPN |
|---|---|
| Founded | 19 February 2000 (new formula) 2008 (as III liga) |
| Country | Poland |
| Confederation | UEFA |
| Number of clubs | 72 (4 groups of 18) |
| Level on pyramid | 4 |
| Promotion to | II liga |
| Relegation to | IV liga |
| Domestic cup | Polish Cup |
| Current champions | Unia Skierniewice (Group I) Sokół Kleczew (Group II) Śląsk Wrocław II (Group III) Sandecja Nowy Sącz (Group IV) (2024–25) |
| Sponsor(s) | Betclic |
| Current: 2025–26 III liga | |
III liga (Trzecia liga, lit. 'Third League'), currently named Betclic III liga due to its sponsorship by Betclic, is a Polish football league that sits in the fourth tier of the Polish football league system. Until the end of the 2007–08 season, III liga referred to a league at the third tier (now called II liga) but this was changed with the formation of the Ekstraklasa as the top level league in Poland.
Groups of III liga are divided based on administrative division of Poland. Top teams of III liga are promoted to II liga and bottom teams are relegated to IV liga.