when did yugoslavia split

Yugoslavia did not split all at once; it broke apart in stages during the early 1990s.

Very short answer

People usually say Yugoslavia “split” starting in 1991, when Slovenia and Croatia declared independence in June 1991, and ending by 1992, when Bosnia and Herzegovina and Macedonia had also left and only Serbia and Montenegro remained. In a formal sense, the old Socialist Federal Republic of Yugoslavia was effectively gone by April 1992.

Key dates in the breakup

• 25 June 1991 – Slovenia and Croatia declare independence from Yugoslavia.

• 1991–1992 – Short war in Slovenia, longer and much bloodier conflict in Croatia.

• January 1992 – Macedonia (today North Macedonia) declares independence.

• March–April 1992 – Bosnia and Herzegovina declares independence, followed by the start of the Bosnian War.

• April 1992 – Serbia and Montenegro form the Federal Republic of Yugoslavia, replacing the old socialist federation and marking the practical end of the original Yugoslav state.

So if you just need one year to remember for “when did Yugoslavia split?”, 1991 is the year the breakup began, and 1992 is when it was essentially completed.