Ma'anshan (), 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.
The prefecture-level city of Ma'anshan administers 6 county-level divisions, including 3 districts and 3 counties.
Yushan District (雨山区)
Huashan District (花山区)
Bowang District (博望区)
Dangtu County (当涂县)
He County (和县)
Hanshan County (含山县)
In September 2012, Jinjiazhuang District was dissolved and merged with Huashan District, while part of Dangtu County was split and established as Bowang District.
The name of the city means "Horse Saddle Mountain". According to legend, the name came to be when the Western Chu hegemon Xiang Yu was fleeing from the Battle of Gaixia. Rather than be captured, the defeated general killed himself at the area now known as Ma'anshan after ensuring that his beloved horse would be ferried across the river to safety. Upon seeing his master die, the grief-stricken horse leapt into the river and was drowned. As a tribute, the boatman buried the horse's saddle on a nearby hill, giving Ma'anshan its name.
Osmanthus fragrans is the city flower of Ma'anshan and is widely planted in Ma'anshan. The climate of Ma'anshan is more rainy and mild, suitable for the growth of sweet-scented osmanthus.