| Founded | 1989 as PAF Ligi |
|---|---|
| First season | 1989–90 |
| Country |  Turkey |
| Confederation | UEFA |
| Divisions | 4 |
| Number of teams | 37 |
| Current champions | Galatasaray U21 (8th title) |
| Most championships | Galatasaray U21 (8 titles) |
| Website | A2 Ligi (in Turkish) |
The U21 Ligi is the reserve team league for the top Turkish association football teams in the Süper Lig and 1. Lig. The league is split into western and an eastern division.