Upper Austria is one of the nine states

States of Austria

Austria is a federal republic made up of nine states, known in German as Länder . Since Land is also the German word for a country, the term Bundesländer is often used instead to avoid ambiguity. The Constitution of Austria uses both terms...

 or Bundesländer of Austria

Austria

Austria , officially the Republic of Austria , is a landlocked country of roughly 8.4 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Slovakia and Hungary to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the...

. Its capital is Linz

Linz

Linz is the third-largest city of Austria and capital of the state of Upper Austria . It is located in the north centre of Austria, approximately south of the Czech border, on both sides of the river Danube. The population of the city is , and that of the Greater Linz conurbation is about...

. Upper Austria borders on Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 and the Czech Republic

Czech Republic

The Czech Republic is a landlocked country in Central Europe. The country is bordered by Poland to the northeast, Slovakia to the east, Austria to the south, and Germany to the west and northwest....

, as well as on the other Austrian states of Lower Austria

Lower Austria

Lower Austria is the northeasternmost state of the nine states in Austria. The capital of Lower Austria since 1986 is Sankt Pölten, the most recently designated capital town in Austria. The capital of Lower Austria had formerly been Vienna, even though Vienna is not officially part of Lower Austria...

, Styria

Styria (state)

Styria is a state or Bundesland, located in the southeast of Austria. In area it is the second largest of the nine Austrian federated states, covering 16,401 km². It borders Slovenia as well as the other Austrian states of Upper Austria, Lower Austria, Salzburg, Burgenland, and Carinthia. ...

, and Salzburg

Salzburg (state)

Salzburg is a state or Land of Austria with an area of 7,156 km2, located adjacent to the German border. It is also known as Salzburgerland, to distinguish it from its capital city, also named Salzburg...

. With an area of 11,980 km² and 1.412 million inhabitants, Upper Austria is the fourth-largest Austrian state by land area and third-largest by population.
For a long period of the Middle Ages, much of Upper Austria belonged to the Duchy of Styria

Duchy of Styria

The history of Styria concerns the region roughly corresponding to the modern Austrian state of Styria and the Slovene region of Styria from its settlement by Germans and Slavs in the Dark Ages until the present...

.