Kim Jae-Yup (born May 17, 1965) is a retired South Korean judoka.
At the age of 19, he became runner-up in the extra-lightweight (60 kg) division in the 1984 LA Olympics, losing to Shinji Hosokawa of Japan, who was the resigning world champion, by ippon.
But three years later, Kim went up against Hosokawa in the final again at the World Championship held in Essen, Germany, and avenged the loss, beating by ippon.
In the 1988 Seoul Olympics, Kim finally captured an Olympic gold medal by defeating Kevin Asano of the United States, dominating all the matches without allowing any single point.
He currently serves as a full-time professor at Dong Seoul College in South Korea.