| Founded | July 2017 |
|---|---|
| First season | 2017–18 |
| Country | |
| Confederation | FIBA Europe |
| Divisions | 2 |
| Number of teams | 12 |
| Level on pyramid | 1st |
| Current champions |  Mega Basket U19 (2nd title) (2020–21) |
| Most championships | 3 titles Mega Basket U19 |
The Junior ABA League, officially known as the U19 ABA League Championship, is a regional boy's youth age basketball tournament that is contested between the youth selections of basketball clubs from the ABA League. It is run by the ABA League JTD. It is a regional competition between men's teams from six countries: Bosnia and Herzegovina, Croatia, Montenegro, North Macedonia, Serbia and Slovenia.