Yunjin Kim (born November 7, 1973 in Seoul, South Korea) is an American-Korean film and theatre actress. Although she is best known in the English-speaking world for her role as Sun-Hwa Kwon on the American television series, Lost, Kim has also appeared in numerous film and TV projects in South Korea.

In May 2006, Maxim named Kim #98 on its annual List. In October 2006 she was featured on the cover of Stuff, as well as a spread inside the magazine. Kim appeared in Maxim again in March 2007, where she was described as "the Korean Julia Roberts" in her native Korea. Kim won the 2008 Daejong Award's Lead Actress Award for "Seven Days (2007)" on June 27, 2008, in South Korea.