Hungary is a country in Central Europe. Its capital city is Budapest. Hungary is slightly bigger than its western neighbour Austria and has about 10 million inhabitants. Other countries that border Hungary are Slovakia, Ukraine, Romania, Serbia, Croatia and Slovenia. Hungary's official language is the Hungarian language. It has been a member of the European Union (EU) since 2004. In Hungarian, the country is called "Magyarország" (literally, "Hungarian country"), or "Magyar Köztársaság" (Hungarian Republic). This is named after the Magyar tribes who came to Hungary in the late 9th century.