Lan Yu (died 1393) was a Chinese general who contributed to the founding of the Ming Dynasty. He is counted among the 10 Muslim Defenders of the Ming (). His ancestral home was in present-day Dingyuan County, Anhui. In 1393 Lan was suspected and accused of plotting a rebellion and eventually put to death by the Hongwu Emperor. About 15,000 people were implicated in the case and executed.