Chen Gong (pronunciationⓘ) (died 7 February 199),[a] courtesy name Gongtai, was an adviser to the warlord Lü Bu in the late Eastern Han dynasty of China.

Chen Gong was from Wuyang County (武陽縣), Dong Commandery, which is located at the border between present-day Henan and Shandong provinces.

After more than hundred days of stalemate, a famine forced Lü Bu to give up his position and seek refuge under Liu Bei, successor of Tao Qian, in Xiapi (下邳; present-day Pizhou, Jiangsu), capital of Xu Province.

In 196, Lü Bu turned on his host and took over Xiapi, proclaiming himself the governor of Xu Province and sending Liu Bei to the nearby county of Xiaopei (小沛).

After initial attempts to break the siege failed, Lü Bu intended to surrender but was dissuaded by Chen Gong.

On 7 February 199,[a] Lü Bu's subjects Hou Cheng, Song Xian (宋憲) and Wei Xu (魏續) captured Chen Gong and defected with their troops.

At a signal, fires were lit at all the city gates and Lü Bu's troops cut off the evasion routes.

Chen Gong appears as a character in the Hong Kong manhua The Ravages of Time illustrated by Chan Mou.

Chen Gong has a minor role as a supporter of Lü Bu in the manga Record of Ragnarok, cheering on his lord as he fights against the Norse god Thor to decide humanity's fate.