Chen Commandery (Chinese: 陳郡) was a Chinese commandery that existed from the late Han dynasty to the Sui dynasty. It was located in present-day eastern Henan province. For much of the Western Han dynasty, the territory was part of the vassal Principality of Huaiyang. In 88 AD, Huaiyang was renamed Chen, and was granted to Liu Xian (劉羨), a son of the Emperor Ming later known as the Prince Jing (敬) of Chen. Xian's descendants held the principality until 197 AD, when the last Prince of Chen was killed by Yuan Shu. The commandery administered 9 counties, including Chen, Yangjia (陽夏), Ningping (寧平), Ku (苦), Zhe (柘), Xinping (新平), Fule (扶樂), Wuping (武平) and Changping (長平). The population was 1,547,572, or 112,653 households. In Cao Wei dynasty, the Principality of Chen was briefly restored, and