The 2021–22 AdmiralBet ABA League is the 21st season of the ABA League with 14 teams from Bosnia and Herzegovina, Croatia, Montenegro, Serbia and Slovenia participating in it.

A total of 14 teams contest the league in the 2021–22 season (and until the 2024–25 season), including the 13 highest-placed teams from the previous season and the winner of the 2020–21 ABA League Second Division.

[22] The table lists the results of teams in each round.

On 13 September 2021, the ABA League JTD decided that six highest-placed clubs from the Regular season will qualify for the Playoffs.

However, because of the rule that no more than 5 teams from the same country could participate in ABA league, and since Serbian team Zlatibor is the champion of the ABA League Second Division, relegation playoffs will be played between them and the lowest ranked Serbian team in the ABA League First Division (Borac Čačak).