Social Democratic Workers' Party

• Czechoslovak Social Democratic Workers Party in the Republic of Austria
• Czechoslovak Social Democratic Workers' Party
• Estonian Social Democratic Workers' Party
• German Social Democratic Workers' Party in the Czechoslovak Republic
• Latvian Social Democratic Workers' Party
• Russian Social Democratic Labour Party
• Social Democratic Workers' Party (Netherlands)
• Social Democratic Workers' Party in Subcarpathian Rus'
• Social Democratic Workers' Party of Austria
• Social Democratic Workers' Party of Germany
• Swedish Social Democratic Party