Austria–Hungary relations

Neighbourly relations exist between Austria and Hungary, two member states of the European Union. Both countries have a long common history since the ruling dynasty of Austria, the Habsburgs, inherited the Hungarian throne in the 16th century. Both were part of the now-defunct Austro-Hungarian Empire from 1867 to 1918. The two countries established diplomatic relations in 1921, after their separation.

Both countries are full members of the Council of Europe and of the European Union. They share a 366-kilometre (227 mi) border, which can be crossed anywhere without control, because of the Schengen Agreement.