|   | |
| Organising body | Polish Basketball Association | 
|---|---|
| Founded | 1954 | 
| First season | 1954–55 | 
| Country | Poland | 
| Confederation | FIBA Europe | 
| Number of teams | 18 | 
| Level on pyramid | 2 | 
| Promotion to | Polish Basketball League | 
| Relegation to | II Liga | 
| Current champions | Miasto Szkła Krosno (2nd title) (2024–25) | 
The I Liga (English: First League), officially known as the Bank Pekao S.A. I Liga due to its sponsorship by Bank Pekao, [1] is the second-tier level league of basketball in Poland. It is organised by the Polish Basketball Association. Teams that win the championship have the option to be promoted to the first-tier level Polish Basketball League (PLK). The first I Liga season was held in the 1954–55 season.
| Season | Champions | Runners-up | 
|---|---|---|
| 2013–14 | Polfarmex Kutno | MCKiS Jaworzno | 
| 2014–15 | Stal Ostrów Wielkopolski | Politechnika Poznańska | 
| 2015–16 | Miasto Szkła Krosno | Legia Warsaw | 
| 2016–17 | Legia Warsaw | GTK Gliwice | 
| 2017–18 | Spójnia Stargard | Sokół Łańcut | 
| 2018–19 [2]  | Astoria Bydgoszcz | Śląsk Wrocław | 
| 2019–20 [3]  | Górnik Wałbrzych | Czarni Słupsk | 
| 2020–21 | Czarni Słupsk | Górnik Wałbrzych | 
| 2021–22 | Sokół Łańcut | Górnik Wałbrzych | 
| 2022–24 | Dziki Warsaw | Górnik Wałbrzych | 
| 2023–24 | Górnik Wałbrzych | Astoria Bydgoszcz | 
| 2024–25 [4]  | Miasto Szkła Krosno | Astoria Bydgoszcz |