China Democratic Socialist Party was created in 1946.
Democratic Socialist Party of Greece was created in 1935.
Democratic Socialist Party - Japan - was created in 1960.
Democratic Socialist Arab Ba'ath Party was created in 1980.
Sammarinese Independent Democratic Socialist Party was created in 1957.
New Democratic Party Socialist Caucus was created in 1998.
Lithuanian Popular Socialist Democratic Party was created in 1917.
Freedom Socialist Party was created in 1966.
Socialist Workers' Party of China was created in 1919.
Social Democratic Action was created in 1951.
Democratic Socialist Party - Japan - ended in 1994.
Democratic Socialist Party - France - ended in 1954.
There’s more than one answer. The Socialist Party of America was one.