The Revolutions of 1848 in the Austrian Empire were a set of revolutions that took place in the Austrian Empire from March 1848 to November 1849. Much of the revolutionary activity had a nationalist character: the Empire, ruled from Vienna, included ethnic Germans, Hungarians, Poles, Bohemians (Czechs), Ruthenians (Ukrainians), Slovenes, Slovaks, Romanians, Croats, Italians, and Serbs; all of whom attempted in the course of the revolution to either achieve autonomy, independence, or even hegemony over other nationalities. The nationalist picture was further complicated by the simultaneous events in the German states, which moved toward greater German national unity.

The Austrian Empire, officially known as the Empire of Austria, was a multinational European great power from 1804 to 1867, created by proclamation out of the realms of the Habsburgs. During its existence, it was the third most populous monarchy in Europe after the Russian Empire and the United Kingdom. Along with Prussia, it was one of the two major powers of the German Confederation. Geographically, it was the third-largest empire in Europe after the Russian Empire and the First French Empire.