1990 South American Badminton Championships

The 1990 South American Badminton Championships (Campeonato Sul-Aamericano Adulto de Badminton 1990) was a badminton tournament sanctioned by the South American Badminton Confederation and Badminton Pan America. The individual and team events were held from 22 to 28 October 1990.

The tournament was held at Ginásio Municipal de Esportes located in Mairinque, Brazil. Six countries took part in the tournament. Peru won first place in the men's and women's team event, while Brazil finished in second place.