Kim Hyung-joo (born 12 September 1984 in Gyeongbuk) is a South Korean freestyle wrestler. In the women's 48 kg freestyle wrestling event at the 2008 Summer Olympics, she reached the quarter-finals, losing to Carol Huynh. She competed in the freestyle 48 kg event at the 2012 Summer Olympics and was eliminated in the 1/8 finals by Iryna Merleni.