The 1991 Recopa Sudamericana was the 3rd Recopa Sudamericana, an annual football match between the winners of the previous season's Copa Libertadores and Supercopa Sudamericana competitions. However, this edition never needed to be disputed as Olimpia of Paraguay managed to win both the 1990 Copa Libertadores and 1990 Supercopa Sudamericana. Olimpia were declared automatic winners of the Recopa Sudamericana after their triumph in the Supercopa Sudamericana.