Kim Su-ji (born 16 February 1998) is a South Korean diver. She competed in the 10-metre platform event at the 2012 Summer Olympics. The youngest member of the South Korean contingent at the Olympics that year, she lives in Ulsan, where she graduated from Guyeong Primary School and went on to Cheonsang Middle School. She won a bronze medal along with in the women's 10-metre synchronised platform event at the 2013 East Asian Games in Tianjin. She acquired 8th position in 2018 Asian Games Women's 3-metre springboard and won a bronze medal in 1 metre springboard.