Kim Dong-hyun (Hangul: ???; born 12 November 1987) is a South Korean bobsledder who has competed since 2008.
At the 2010 Winter Olympics in Vancouver, he finished 19th in the four-man event.
Kim finished 30th in the two-man event at the FIBT World Championships 2009 in Lake Placid, New York.
His best World Cup finish was 26th in the two-man event at Whistler, British Columbia in 2009.
At the 2018 Winter Olympics in Pyeongchang, the South Korean four-man team of Seo Young-woo, Won Yun-jong, Jun Jung-lin, and Kim Dong-hyun won a surprising silver medal in the four-man event, tying with a German team led by Nico Walther.
With the silver medal, South Korea became the first Asian nation to claim an Olympic medal in a bobsleigh event.