Jeongseon Lee clan (Korean: 정선 이씨; Hanja: 旌善 李氏, Vietnamese: Tinh Thiện Lý thị) is a Korean clan.
According to the research held in 2000, the number of Jeongseon Lee clan's member was 3657.
According to the genealogical records of the Jeongseon Lee clan, their founder was Lý Dương Côn [ko] who was exiled to the Song dynasty and was settled in Qìng Prefecture during Emperor Huizong of Song's reign and then fled to Goryeo to avoid war with the Jin dynasty (1115–1234).
The son of Yi Yang-gon, Yi Nan, (이난; 李蘭), became a Minister of Rites (예의판서; 禮儀判書; yeŭi p'ansŏ), and Yang-gon's grandson, Yi Mu-chŏng (이무정; 李茂貞) was a junior second-grade official as a senior executive in letters (정당문학; 政堂文學; chŏngdang munhak).
It would be near impossible for Yi Ŭi-min, who took part in the 1170 military coup, to be his sixth generation descendant.