| 2011–12 Liga Nacional de Básquet season | |
| League: | Liga Nacional de Básquet |
| Sport: | Basketball |
| Duration: | 23 September 2011 – 13 March 2012 (regular season) 16 March – 31 May 2012 (playoffs) |
| No Of Teams: | 16 |
| Tv: | TyC Sports |
| Mvp: |  Juan Pedro Gutiérrez |
| Top Scorer: |  Joe Troy Smith |
| Playoffs: | 2012 Liga Nacional de Básquet Playoffs |
| Finals Champ: | Peñarol |
| Finals Runner-Up: | Obras Sanitarias |
| Finals Mvp: | Facundo Campazzo (Peñarol) |
| Seasonslistnames: | Liga Nacional de Básquet |
| Prevseason Link: | 2010–11 Liga Nacional de Básquet season |
| Prevseason Year: | 2010–11 |
| Nextseason Link: | 2012–13 Liga Nacional de Básquet season |
| Nextseason Year: | 2012–13 |
The 2011–12 Liga Nacional de Básquet season was the 28th season of the top professional basketball league in Argentina. The regular season started on 23 September 2011. Peñarol won their fourth title, defeating Obras Sanitarias in the finals.
Torneo Nacional de Ascenso Champions from the previous season Quilmes and runners-up San Martín de Corrientes were promoted, occupying the berths left by El Nacional and Argentino de Junín. Quilmes and San Martín de Corrientes would be relegated at the end of the season.
| width=250px | Team | width=200px | City | width=200px | Arena | width=70px | Capacity |
|---|---|---|---|---|---|---|---|
| Estadio José Albert | |||||||
| 3,730 | |||||||
| Osvaldo Casanova | 3,950 | ||||||
| 2,000 | |||||||
| 2,000 | |||||||
| 2,276 | |||||||
| Estadio Moisés Flesler | 2,100 | ||||||
| Antonio Rotili | 4,000 | ||||||
| El Hogar de los Tigres | 4,000 | ||||||
| 3,100 | |||||||
| 8,000 | |||||||
| 8,000 | |||||||
| 5,200 | |||||||
| José Jorge Contte | 4,000 | ||||||
| Estadio Raúl Argentino Ortiz | 2,500 | ||||||
| 4,500 |
The first stage took place between 23 September and 13 November 2011. Teams were divided into two zones. The top four teams from each zone competed in the Torneo Súper 8 that took place in November.
The eighth edition of Torneo Súper 8 took place on 23–26 November 2011 in the city of Mar del Plata, Buenos Aires. Home team Peñarol won their third title, defeating Libertad in the Final.
The second stage started on 17 November 2011. All 16 teams were ranked together. Each team carried over half of the points obtained in the first stage.
The Playoffs started on 16 March 2012 and ended on 31 May 2012. Peñarol defeated Obras Sanitarias in the Finals.
The relegation series began on 16 March. San Martín de Corrientes and Quilmes lost their respective series and were relegated to the Torneo Nacional de Ascenso.
| Team | Competition | Progress | |
|---|---|---|---|
| bgcolor=#C0C0C0 | Runners-up | ||
| Semifinals | |||
| Semifinals | |||
| Final four | |||
| bgcolor=gold | Champions |