| Liga Nacional de Básquet | |
| League: | Liga Nacional de Básquet |
| Sport: | Basketball |
| Pixels: | 200px |
| Duration: | 22 September 2018 – 12 May 2019 (regular season) |
| No Of Teams: | 20 |
| Tv: | TyC Sports DirecTV Sports |
| Season: | 2018–19 |
| Champions: | San Lorenzo 4th title |
| Runners Up: | Instituto |
| Mvp: |  Marcos Mata |
| Promoted: | Libertad |
| Relegated: | Quilmes |
| Continentalcup1: | Champions League Americas |
| Continentalcup1 Qualifiers: | San Lorenzo Instituto |
| Continentalcup2: | Liga Sudamericana |
| Continentalcup2 Qualifiers: | Ferro Carril Oeste Ciclista Olímpico |
| Playoffs: | Liga Nacional de Básquet Playoffs |
| Playoffs Link: | Liga Nacional de Básquet Playoffs |
| Finals Mvp: |  Dar Tucker |
| Seasonslist: | List of Liga Nacional de Basquet seasons |
| Seasonslistnames: | Liga Nacional de Básquet |
| Prevseason: | 2017–18 |
| Nextseason: | 2019–20 |
| Updated: | 5 July 2019 |
The 2018–19 Liga Nacional de Básquet season is the 35th season of the top professional basketball league in Argentina. The season started on 22 September 2017 with the Torneo Súper 20, which finished on 22 December 2018. The regular season began on 5 December 2018 and finished on 12 May 2019. Following the last season, the competition continues with all 20 teams being placed in a single group, playing a double round-robin, where the best 16 teams at the end of the season qualify for the championship playoffs, while the two teams with the worst record play in a best-of-five relegation series. Before the start of the regular season, the Torneo Súper 20 took place, which awarded two berths to the 2019 Liga Sudamericana de Básquetbol. Quilmes was relegated after losing the playoff series against Atenas.[1]
La Liga Argentina de Básquet Champions Libertad covered the berth left by Salta Basket, who lost the relegation playoffs against Ferro Carril Oeste.
| width=200px | Team | width=200px | City | width=200px | Arena | width=70px | Capacity |
|---|---|---|---|---|---|---|---|
| El Fortín de las Morochas | 1,500 | ||||||
| 3,730 | |||||||
| 2,000 | |||||||
| Vicente Rosales | 3,400 | ||||||
| Estadio de Comunicaciones | 3,500 | ||||||
| Gigante Verde | 1,610 | ||||||
| Estadio Héctor Etchart | 4,500 | ||||||
| 2,276 | |||||||
| Gimnasio Boxing Club | 3,000 | ||||||
| Angel Sandrin | 2,000 | ||||||
| 4,500 | |||||||
| El Hogar de los Tigres | 4,000 | ||||||
| 3,100 | |||||||
| 8,000 | |||||||
| Once Unidos | 3,000 | ||||||
| 5,200 | |||||||
| José Jorge Contte | 4,000 | ||||||
| Polideportivo Roberto Pando | 2,200 | ||||||
| Raúl A. Ortiz | 2,500 | ||||||
| Osvaldo Casanova | 3,950 |
The second edition of the pre-season tournament Torneo Súper 20 took place between 22 September and 22 december 2018.[2] Four groups of five teams each were formed, and played a double round-robin. The top three teams from each group advanced to the playoff stage directly, while the fourth and fifth teams of each group were paired in four best-of-three series to grant the four remaining berths for the playoff stage. The playoff stage consisted of best-of-three series up to the semifinals, where a final four, single-elimination match format was used.
Playoffs began on 15 May. The relegation series between Atenas and Quilmes began on 18 May.
|}
| Team | Competition | Progress | |
|---|---|---|---|
| Second stage | |||
| First stage | |||
| bgcolor=gold | Champions | ||
| bgcolor=#C0C0C0 | Runners-up | ||
| Semifinals | |||
| Semifinals |
The regular season awards were presented on 13 May.[3]