Foshan (UK: /foʊˈʃæn/, US: /-ʃɑːn/), alternately romanized as Fatshan, is a prefecture-level city in central Guangdong Province, China. The entire prefecture covers 3,848 km2 (1,486 sq mi) and had a population of 9,498,863 as of the 2020 census. The city is part of the western side of the Pearl River Delta Economic Zone whose built-up (or metro) area was home to 65,694,622 inhabitants as of 2020 (excluding Hong Kong not conurbated yet), making it the biggest urban area of the world.