Luo Yin (833–January 26, 910), born Luo Heng, courtesy nameZhaojian, was a Chinese statesman and poet of the Tang Dynasty. Luo was born in Fuyang, Zhejiang. At the age of 20, he took his first imperial exam. He failed the exam ten times. As a result, he gave himself the pseudonym "Yin" (lit. "dormant").
He was said to be of ugly countenance, and that he thought highly of himself and looked down on others. In 870, he was given a post in Hunan. However, he was unable to take advantage of the post, and returned to Zhejiang in 887. Penniless and frustrated, he later became an assistant to Qian Liu, but never shed his arrogant ways. He died at the age of 77.