Social Democratic Party of Hungary

The Social Democratic Party of Hungary (Hungarian: Magyarországi Szociáldemokrata Párt, pronounced, MSZDP) is a social democraticpolitical party in Hungary. Historically, the party was dissolved during the occupation of Hungary by Nazi Germany (1944–1945) and the communist period of Hungary from 1948 to 1989, after being forced into a merger with the Communist Party. It worked legally for a short time during the Revolution of 1956.

It was a government party as a part of the Károlyi Government (1918–1919), Berinkey Government, Peidl Government (1919), Interim National Assembly (1944–1945) and Dinnyés Government (1947–1948). It was reorganized after Hungary's transition from communism in 1989.

MSZDP used to be a member of the Socialist International and the Party of European Socialists until 2020, when it was delisted from both due to inactivity.