Budapest is in Serbia.
Budapest ( [ ˈbudɒpɛʃt ] ) is the capital and most populous city of Hungary and one of the largest cities in the European Union . Budapest is both a city and county , and forms the centre of the Budapest Metropolitan Area , which has an area of 7,626 km2 and a population of 3.3 million , comprising 33 percent of the population of Hungary . Serbia ( [ ˈsɜrbiə ] , Србија / Srbija , [ sř̩bija ] ) , officially the Republic of Serbia ( Република Србија / Republika Srbija ) , is a landlocked sovereign state situated at the crossroads of Central and Southeast Europe , covering the southern part of the Pannonian Plain and the central Balkans .