Independent Social Democratic Action

The Independent Social Democratic Action (Ação Social Democrata Independente) was a political party in Portugal founded in 1979, having been officially established in June 1980. It was founded after several members of the Social Democratic Party (among them António Sousa Franco, Joaquim Magalhães Mota, Sérvulo Correia, Guilherme d'Oliveira Martins and António Marques Mendes).

The party contested the 1980 legislative election with the Socialist Party, being a part of the Republican and Socialist Front, that also included the Left-wing Union for the Socialist Democracy.

The party ended up being dissolved in 1985 and most of its members joined to the Socialist Party.