U+9673 CJK Unified Ideo­graph-​9673

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Chen ([ʈʂʰə̌n] (listen)) (simplified Chinese: 陈; traditional Chinese: 陳; pinyin: Chén; Wade–Giles: Ch'ên; Jyutping: Can4; Cantonese Yale: Chàhn) is a common Chinese surname and one of the most common surnames in Asia. It is the most common surname in Taiwan (2010) and Singapore (2000). Chen is also the most common family name in Guangdong, Zhejiang, Fujian, Macau, and Hong Kong. It is the most common surname in Xiamen, the ancestral hometown of many overseas Hoklo.

Chen was listed 10th in the Hundred Family Surnames poem, in the verse 馮陳褚衛 (Feng Chen Chu Wei).

In Cantonese, it is usually romanized as Chan (as in Jackie Chan), most widely used by those from Hong Kong. Chan is also widely used in Macao and Malaysia. It is also sometimes spelled Chun. In many Southern Min dialects (including dialects of Hainan, Fujian, and Taiwan), the name is pronounced Tan, while in Teochew, it is pronounced Tang. In Hakka and Taishanese, the name is spelled Chin. In Wu it is pronounced Zen or Tchen.

In Vietnam, this surname is written as Trần (in Quốc Ngữ) and is 2nd most common. In Thailand, this surname is the most common surname of Thai Chinese and is often pronounced according to Teochew dialect as Tang. In Cambodia, this surname is transliterated as Taing. In Japanese, the surname is transliterated Chin (ちん). In Korean it is transliterated Jin or Chin (진).

In Indonesia, the surname is transliterated as Hartanto.

Chen is 5th most common in mainland China, but 4th most common in the world due to Chen's larger overseas population. With all its various spellings and pronunciations, there are around 80-100 million people surnamed 陳 / 陈 worldwide.

The surname Cheng (程) is sometimes romanized as Chen (e.g. John S. Chen). Another less common Chinese surname 諶 / 谌 (Shen) can also be romanized as Chen.