List of left communist organisations in the Weimar Republic

The list of Left Communist organisations in the Weimar Republic includes groups and organisations associated with left communism. Some of them are groups of the left-wing opposition of the Communist Party of Germany (KPD) who opposed the course of KPD leadership both within and without the party, especially against the Stalinization. They formed party factions in the KPD, were excluded or broke away to form independent groups.