Mianyang (simplified Chinese: 绵阳; traditional Chinese: 綿陽; pinyin: Miányáng) is the second largest prefecture-level city of Sichuan province in Southwest China. Its population was 4,613,871 at the 2010 census covering an area of 20,267.46 square kilometres (7,825.31 sq mi) consisting of Jiangyou, a county-level city, six counties and two urban districts. Its built-up (or metro) area was home to 1,722,133 inhabitants including the city proper of Mianyang (two urban districts) and An County largely being conurbated as urbanisation sprawls.