Hungarian-German Social Democratic Party

The Hungarian-German Social Democratic Party (German: Ungarisch-Deutsche Partei der Sozialdemokraten, Hungarian: Magyar és Német Szociál-Demokrata Párt) was a social democratic political party in Slovakia (part of Czechoslovakia at the time). It was founded in 1919 by social democrats from ethnic minority communities. The party had a German and a Hungarian section. The German and Hungarian social democrats in Slovakia had developed an antagonistic relationship with the Slovak social democrats, who had merged into the Czechoslovak Social Democratic Workers Party as Austria-Hungary was broken up after the First World War. Issues of contention between Hungarian/German and Slovak social democrats included views of the February Strike of 1919 and the Hungarian Soviet Republic (which the Slovak social democrats considered a threat to their new state).

Like the other Hungarian parties in Czechoslovakia at the time, the Hungarian-German Social Democratic Party opposed the very existence of the Czechoslovak Republic.

Leaders of the party included Sam Mayer, Gyula Nagy (between 1919 and 1922), Géza Borovszky (from 1922 onwards) and Jószef Földessy.