Taishan, alternately romanized in Cantonese as Toishan or Toisan, in local dialect as Hoisan, and formerly known as Xinning or Sunning (新寧), is a county-level city in the southwest of Guangdong province, China. It is administered as part of the prefecture-level city of Jiangmen. During the 2020 census, there were 907,354 inhabitants, but only 433,266 were considered urban. Taishan calls itself the "First Home of the Overseas Chinese". An estimated half a million Chinese Americans are of Taishanese descent.

A county-level municipality, county-level city or county city, formerly known as prefecture-controlled city, is a county-level administrative division of the People's Republic of China. County-level cities have judicial but no legislative rights over their own local law and are usually governed by prefecture-level divisions, but a few are governed directly by province-level divisions.