Socialist Action may refer to a number of current and former political parties and organisations, mainly in the Trotskyist tradition:
Current
- Socialist Action (Canada)
- Socialist Action (Hong Kong)
- Socialist Action (UK)
- Socialist Action (United States)
Former
- Socialist Action (Australia)
- Socialist Action League, the former name of the Trotskyist Communist League (New Zealand)
- Socialist Action Party (PASOC), a left breakaway from the Spanish Socialist Workers' Party that participated in the formation of the United Left (Spain)
- League for Socialist Action (Canada), a Trotskyist group in Canada that merged to form the Revolutionary Workers League in 1977
- League for Socialist Action (UK), a Trotskyist group in the United Kingdom that remerged with the International Marxist Group in 1982
<!-- *Socialist Action Group (Australia), a breakaway group from the Trotskyist Socialist Alternative (Australia). It had no formal international affiliation, but had its roots in groups aligned with the International Socialist Tendency. In February 2008, it joined with the International Socialist Organisation and ISO splinter-group Solidarity to form a new group called Solidarity, representing the IST in Australia
- Socialist Action (Brazil), the English translation of Ação Socialista, a breakaway from the Trotskyist United Socialist Workers' Party. It has no formal international affiliation, though its parent group is a member of the International Workers League (Fourth International)
- Socialist Action/AKP (Germany) is the English translation of Sozialistische Aktion/AKP which was a member of the International Trotskyist Committee for the Political Regeneration of the Fourth International. It was founded as Working Circle Communist Politics, or as Arbeitskreis Kommunistische Politik (AKP) respectively, and is based in Mönchengladbach -->