The Emperor of Austria (German: Kaiser von Österreich) was a hereditary imperial title and position proclaimed in 1804 by the Holy Roman Emperor Francis II, a member of the House of Habsburg-Lorraine, and continually held by him and his heirs until the last emperor relinquished power in 1918. The emperors retained the title of archduke of Austria. The wives of the emperors bore the title of empress, while other members of the family the title archduke or archduchess.

Members of the House of Austria, the Habsburg dynasty, for centuries have been elected Holy Roman Emperors and mostly resided in Vienna. That's why the term "Austrian emperor" may occur in texts dealing with the time before 1804, when no Austrian Empire existed. In these cases the word Austria always means the dynasty, not the country. A special case was Empress Maria Theresa; she bore the imperial title as the wife of Francis I, Holy Roman Emperor, but she herself was the monarch of the Austrian Hereditary Lands including Bohemia and Hungary.

Austria (ⁱ/ˈɒstriə/ or /ˈɔːstriə/; German: Österreich [ˈøːstɐˌʁaɪç] ( listen)), officially the Republic of Austria (German:  Republik Österreich (help·info)), is a landlocked country of roughly 8.47 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Hungary and Slovakia to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the west. The territory of Austria covers 83,855 square kilometres (32,377 sq mi) and has a temperate and alpine climate. Austria's terrain is highly mountainous due to the presence of the Alps; only 32% of the country is below 500 metres (1,640 ft), and its highest point is 3,798 metres (12,461 ft). The majority of the population speak local Austro-Bavarian dialects of German as their native language, and German in its standard form is the country's official language. Other local official languages are Burgenland Croatian, Hungarian and Slovene.

The origins of modern-day Austria date back to the time of the Habsburg dynasty when the vast majority of the country was a part of the Holy Roman Empire of the German Nation. During the 17th and 18th centuries, Austria became one of the great powers of Europe and, in response to the coronation of Napoleon I as the Emperor of the French, the Austrian Empire was officially proclaimed in 1804. In 1867, the Austrian Empire was reformed into Austria-Hungary.

Franz Joseph I or Francis Joseph I (German: Franz Joseph I., Hungarian: I. Ferenc József, 18 August 1830 – 21 November 1916) was Emperor of Austria, King of Bohemia, King of Croatia, Apostolic King of Hungary, King of Galicia and Lodomeria and Grand Duke of Cracow from 1848 until his death in 1916. From 1 May 1850 until 24 August 1866 he was President of the German Confederation.

In December 1848, Emperor Ferdinand I of Austria abdicated the throne as part of Ministerpräsident Felix zu Schwarzenberg's plan to end the Revolutions of 1848 in Austria, which allowed Ferdinand's nephew Franz Joseph to ascend to the throne. Largely considered to be a reactionary, Franz Joseph spent his early reign resisting constitutionalism in his domains. The Austrian Empire was forced to cede most of its claim to Lombardy–Venetia to the Kingdom of Piedmont-Sardinia following the conclusion of the Second Italian War of Independence in 1859, and the Third Italian War of Independence in 1866. Although Franz Joseph ceded no territory to the Kingdom of Prussia after the Austrian defeat in the Austro-Prussian War, the Peace of Prague (23 August 1866) settled the German question in favor of Prussia, which prevented the unification of Germany under the House of Habsburg (Großdeutsche Lösung).