Kim Ji-su (born 12 December 2000) is a South Korean judoka.
Kim participated at the 2018 World Judo Championships, winning a medal. In 2021, Kim won the silver medal in her event at the 2021 Asian-Pacific Judo Championships held in Bishkek, Kyrgyzstan.
Kim competed in the women's 57 kg event at the 2020 Summer Olympics held in Tokyo, Japan.