Ran Yong (Chinese: ; Wade-Giles: Jan Yung; 522 BC - ?), also known by his courtesy name Zhonggong (Chinese: ; Wade-Giles: Chung-kung), was one of the prominent disciples of Confucius. Confucius thought highly of his excellent moral conduct, and considered him fit to be the ruler of a state. After completing school, he served as chief officer of Jisun, the noble clan that dominated the politics of Lu.
Ran Yong was a native of the State of Lu. He was 29 years younger than Confucius, and was from the same clan as Ran Geng and Ran Qiu, two other prominent disciples of Confucius. He was of the same age as Ran Qiu. He was known for his moral integrity, despite being born to a father of lowly status, and Confucius declared that his background would not detract from his excellence. He was said to be not an eloquent speaker.