Slovakia ( (); Slovak: Slovensko [ˈslɔʋenskɔ] ()), officially the Slovak Republic (Slovak: Slovenská republika [ˈslɔʋenskaː ˈrepublika] ()), is a landlocked country in Central Europe. It is bordered by Poland to the north, Ukraine to the east, Hungary to the south, Austria to the southwest, and the Czech Republic to the northwest. Slovakia's mostly mountainous territory spans about 49,000 square kilometres (19,000 sq mi), with a population of over 5.4 million. The capital and largest city is Bratislava, while the second largest city is Košice.