Ma'anshan (Chinese: 马鞍山), also colloquially written as Maanshan, is a prefecture-level city in the eastern part of Anhui province in Eastern China. An industrial city stretching across the Yangtze River, Ma'anshan borders Hefei to the west, Wuhu to the southwest, and Nanjing to the east. It is a satellite city of the Nanjing metropolitan area and is also a city in the Yangtze River Delta Economic Zone.
As of the 2020 census, Ma'anshan was home to 2,159,930 inhabitants, of whom 1,253,960 lived in the built-up (or metro) area made of Huashan and Yushan urban districts and Dangtu County, which is largely urbanized.
One can notice that Ma'anshan is now being conurbated with Nanjing making a combined built-up area of 8,419,252 inhabitants.
After the August 2011 administrative re-regionalization of Anhui Province, its population rose to 2.16 million, as two additional counties (He and Hanshan) were placed under its administration.