Socialist Republic of Germany
Sozialistrepublik Deutschland
Flag of the German Reich (1935–1945).svg
1939–1990 National Bolshevik Party.svg
National Bolshevik Party.svg Coa lkhgermany.png
Flag Coat of arms
Proletarier aller Länder, vereinigt Euch! (1939 - 1949)
Workers of the world, unite!
Für das Vaterland! (1949 - 1990)
For the Fatherland!
Das Lied der Deutschen
Territory of North Germany, circa 1941.

Dark green: De facto territory

Light green: Claimed territory
Capital Berlin (de facto)
Languages German, Danish, Low German
Government Marxist-Leninist single-party socialist state
 -  1939–1951 Ernst Thälmann (first)
 - 1951–1973 Walter Ulbricht (last)
Prime Minister
 - 1939–1973 Walter Ulbricht
Chairman of the Ländertag
 - 1973-1989 Erich Honecker (first)
 -  Upper house Ländertag
 -  Lower house Volkstag
Historical era Cold War
 -  Berlin Revolution 15th November 1939 1939
 - Adoption of the Volksflagge 1st January 1940
 - Constitution 11th March 1940
 - Capture of Munich 2nd October 1990
 -  Reunification of Germany 3rd October 1990 1990
Currency Deutsche Volksmark

The Socialist Republic of Germany (German: Sozialistrepublik Deutschland, abbriev. SRD) was a single-party communist regime located in northern Germany, and later all of Germany save the city of Munich. It was formed in November 1939 after a communist revolution spearheaded by the Communist Party of Germany overthrew the ruling National Socialist government of Germany after the assassination of Adolf Hitler earlier that month. The Nazis fled Berlin and moved their capital to Munich. The SRD and the German Reich were embroiled in a decades-long civil war (albeit with several truce periods) for control of Germany. While the SRD claimed sovereignty over all of Germany, it only had definitive control over Berlin, East Prussia and Westphalia. The Nazis had jurisdiction over Bavaria, Württemberg and Austria. This division of Germany was such that the two German governments' de facto territories were referred to as North and South Germany respectively.

Governments around the world most often recognised only one of the two states as the only Germany. The supporters of the SRD included the Soviet Union, United Kingdom and France. The UK and France back the SRD mainly because of its anti-Nazi attitudes, and the Soviet Union naturally supported the SRD for its communist government. Some of the countries that believed the National Socialists in the south are the true German state were Italy and Slovakia. Others, such as the United States, maintained neutrality, recognising both the Socialist and Nazi governments, or none of them. The Scandinavian states for example, only recognised the government of the old Weimar Republic, although it no longer existed.

In 1990, the SRD's military was ordered to invade Munich, by that time the last stronghold of Nazism. The head of Nazi Germany at the time, Kurt Dietrich, chose to surrender and was arrested by the communists. On October 3rd, Germany was formally reunified, and enforcement of the constitution and laws of North Germany was officially extended to include the former territories of South Germany.