Kim Dong-hyun (born 8 October 1978) is a former professional tennis player from South Korea.

Kim made his only ATP Tour main draw appearance in the doubles at the 1996 Korea Open, where he partnered with Lee Jong-min to make the semi-finals as wildcards.

[1] In 1997 he began playing for the South Korea Davis Cup team and went on to feature in a total of 10 ties.

[2] During his career he represented South Korea at the Asian Games and Summer Universiade.

He was a member of the gold medal winning Korean team at the 1998 Asian Games and won a mixed doubles gold medal at 1999 Summer Universiade.