The 2023–24 ABA League Second Division is the 6th season of the ABA Second Division with 14 teams from Bosnia and Herzegovina, Croatia, Montenegro, North Macedonia, Serbia, and Slovenia participating in it.
This season, instead of wild card invitation, qualification rounds determine one participant.
Teams were paired in two-legged matches, with winners decided on aggregate score.
The Regular season is split in five tournaments featuring two or three rounds.
Knock-out elimination phases will be played under two-game format.