Im Sung-jae (born 30 March 1998), also known as Sungjae Im, is a South Korean professional golfer. He won twice on the 2018 Web.com Tour and, with three runner-up finishes as well, was the leading regular season money winner on the tour.
Im turned professional in 2015. In 2016 and 2017 he played on the Japan Golf Tour, his best finish being joint runner-up in the 2017 Mynavi ABC Championship.
In December 2019, Im played on the International team at the 2019 Presidents Cup at Royal Melbourne Golf Club in Australia.