The 2017–18 ABA League Second Division was the inaugural season of the ABA League Second Division with 12 men's teams from Serbia, Croatia, Slovenia, Montenegro, Bosnia and Herzegovina and Macedonia participating in it.

On July 24, 2017, ABA League Assembly has decided to start the ABA League Second Division from the 2017–18 season, in which there will be 12 participants.

Based on the results in the national championships and by taking into account which clubs have sent applications for participation in the ABA League Second Division, these teams will play in the ABA League Second Division.

[1] League positions of the previous domestic league season after playoffs shown in parentheses.

Venue: Laktaši Sports Hall, Laktaši, Bosnia and Herzegovina[11] Source: Adriatic League Second Division Source: ABA League Second Division Attendances include playoff games: Updated to match(es) played on April 4, 2018.