2019–20 ABA League First Division
The 2019–20 ABA League First Division was the 19th season of the ABA League with 12 teams from Bosnia and Herzegovina, Croatia, Montenegro, Slovenia and Serbia participating in it. The season started on 4 October 2019 and played its last games on 9 March 2020 due to the COVID-19 pandemic.
On 12 March 2020, the ABA League Assembly temporarily suspended its competitions due to the COVID-19 pandemic. On 27 May 2020, the ABA League Assembly canceled definitely its competitions due to the COVID-19 pandemic.
Crvena zvezda mts was the defending champion and as a consequence of the COVID-19 pandemic, the ABA League Assembly decided not to recognize any team as the champion for the season.
Teams
Promotion and relegation
A total of 12 teams will contest the league, including 11 sides from the 2018–19 season and one promoted from the 2018–19 Second Division.;Team promoted from the Second Division
;Team relegated to the Second Division
Venues and locations
| Team | Home city | Arena | Capacity | |||
 nts|6,000Regular seasonThe regular season starts in September 2019 and ends in March 2020.League tableMVP ListMVP of the Round
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