The 2011 Liga Sudamericana de Básquetbol, or 2011 FIBA South American League, was the sixteenth edition of the second-tier tournament for basketball teams from South America.

The tournament began on 6 October 2011 and finished on 5 February 2012.

Each group played all their games in a single host city.

The top two teams from each group advanced to the semifinals, which consisted of single-elimination playoffs, where the champion was decided.

An extra match was played for third place between the losing teams from the semifinals.