Crown Prince Dan of Yan (Chinese: ηε€ͺεδΈΉ) was a crown prince of the state of Yan during the Warring States Period in China. Originally a hostage in the State of Qin, he was sent back to Yan in 232 BC. He sent Jing Ke to assassinate Qin Shi Huang, then Emperor of China, but he failed. King Xi of Yan, Dan's father and the last king of Yan, ordered the execution of Dan to please the Qin after Ji, the capital of Yan, had fallen . Invasion of Qin did halt for few years, during which time the states of Wei and Chu were conquered. Meanwhile the King Xi of Yan moved to the Liaodong Commandery.
The state of Yan was conquered in 222 BC and King Xi was captured.
All except King Xi were featured in the Chinese period epic The Emperor and the Assassin. Prince Dan is also featured in the 2004 TV series Assassinator Jing Ke.