Zhongshan is a prefecture-level city in Guangdong province, China, located in the south of the Pearl River Delta. It is alternately romanized via Cantonese as Jungsaan. The city's core subdistricts were formerly known as Shiqi or Shekki.
As of the 2020 census, Zhongshan had a population of 4,418,060. The city now forms part of the Guangzhou–Shenzhen conurbation, which had a total population of 65,565,622 at the same census.