The Parliament of Yugoslavia was the legislature of Yugoslavia. Before World War II in the Kingdom of Yugoslavia it was known as the National Assembly, while in the Socialist Federal Republic of Yugoslavia the name was changed to Federal Assembly. It functioned from 1920 to 1992 and resided in the building of the House of the National Assembly which subsequently served as the seat of the Parliament of Serbia and Montenegro and since 2006 hosts the National Assembly of Serbia. The Federal Assembly was the highest organ of state power and the only branch of government in the country, with all state organs subservient to it under the principle of unified power as it was a one-party state, with the League of Communists of Yugoslavia as the sole legal party in the country. Most of the Federal Assembly's actions simply rubber stamp the party's decisions.

The House of the National Assembly of the Republic of Serbia is the seat of the National Assembly of Serbia. The building is on Nikola Pašić Square in downtown Belgrade, and is a landmark and tourist attraction. Intended to be the House of the National Assembly of the Kingdom of Serbia, between its completion in 1936 and until 2006, it was the seat of the Parliament of Yugoslavia and the Parliament of Serbia and Montenegro. Since 2006 it's serves at the House of the National Assembly of Serbia.