| Prevseason: | 2018–19 |
| Nextseason: | 2020–21 |
| Season: | 2019–20 |
| ABA League First Division | |
| Champions: | None declared |
| Relegated: | None |
| Teams: | 12 |
| Duration: | – |
| Highest Scoring: | (21 December 2019) |
| Biggest Home Win: | (11 November 2019) |
| Biggest Away Win: | (3 November 2019) |
| Highest Attendance: | 16,531 (9 February 2020) |
| Lowest Attendance: | 94 (17 November 2019) |
| Tv: | Arena Sport, O2.TV |
| Award4: | Top Prospect |
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.[1] On 27 May 2020, the ABA League Assembly canceled definitely its competitions due to the COVID-19 pandemic.[2]
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.
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 | Head coach | Captain | Kit manufacturer | Shirt sponsor | |
|---|---|---|---|---|---|
| Budućnost VOLI |  Petar Mijović | Suad Šehović | Spalding | VOLI / Tea Medica | |
| Cedevita Olimpija | Jurica Golemac | Adidas | Cedevita / Petrol | ||
| Cibona |  Ivan Velić | Marin Rozić | Adidas | Erste Bank | |
| Crvena zvezda mts |  Branko Lazić | Nike | mts | ||
| FMP | Vladimir Jovanović | Radoš Šešlija | Cvetex | FMP | |
| Igokea | Dragan Bajić | Sava Lešić | GBT | m:tel | |
| Koper Primorska | Andrej Žakelj | Alen Hodžić | Erreà | Vehicle Rent | |
| Krka | Vladimir Anzulović | Jure Balažič | Žolna šport | Krka | |
| Mega Bemax | Dejan Milojević | Edin Atić | Adidas | Bemax / Tehnomanija | |
| Mornar | Mihailo Pavićević | Marko Mijović | Armani | epcg | |
| Partizan NIS |  Andrea Trinchieri | Novica Veličković | Under Armour | NIS / mts | |
| Zadar | Danijel Jusup | Ive Ivanov | Adidas | OTP Bank / Crodux |
| Team | Outgoing manager | Date of vacancy | Position in table | Replaced with | Date of appointment | Ref. | |
|---|---|---|---|---|---|---|---|
| 23 April 2019 | Off-season | 24 April 2019 | [7] [8] | ||||
| June 2019 | 11 June 2019 | [9] | |||||
| Budućnost VOLI | June 2019 | 20 June 2019 | [10] | ||||
| — | 8 July 2019 | [11] | |||||
| Budućnost VOLI | 18 October 2019 | 3rd (2–0) | 19 October 2019 | [12] [13] | |||
| 19 October 2019 | 12th (0–3) | 23 October 2019 | [14] [15] | ||||
| 22 October 2019 | 8th (1–2) | Andrija Gavrilović (interim) | 22 October 2019 | [16] | |||
| Igokea | 30 October 2019 | 11th (0–4) | 30 October 2019 | [17] | |||
| 5 November 2019 | 8th (2–3) | 7 November 2019 | [18] [19] | ||||
| Crvena zvezda mts | Andrija Gavrilović (interim) | 23 November 2019 | 6th (4–3) | 23 November 2019 | [20] | ||
| 22 December 2019 | 5th (8–3) | 22 December 2019 | [21] | ||||
| 27 January 2020 | 3rd (10–7) | 27 January 2020 | [22] [23] |
The regular season starts in September 2019 and ends in March 2020.
| width=50% valign=top | PIR |
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| width=50% valign=top | Rebounds |
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|}Source: ABA League
| Month | Player | Team | |
|---|---|---|---|
| 2019 | |||
| October | Aleksa Radanov | FMP | [24] |
| November | Filip Bundović | Cibona | [25] |
| December |  Rashawn Thomas | Partizan NIS | [26] |
| 2020 | |||
| January | Justin Cobbs | Budućnost VOLI | [27] |
| February | Uroš Luković | Mornar | [28] |
| Competition | Team | Progress | Result | |
|---|---|---|---|---|
| 14th (11–17) | ||||
| (2) | 0–0 against  UNICS | |||
| Cedevita Olimpija | 6th (4–6) | |||
| 5th (3–7) | ||||
| 7th (4–10) | ||||
2019–20 Basketball League of Serbia 2019–20 Prva A liga 2019–20 Basketball Championship of Bosnia and Herzegovina