Kim Dong-seon (김동선, Korean pronunciation: [kim.doŋ.sʌn] or [kim] [toŋ.sʌn]; born 30 May 1989 in Seoul, South Korea) is a South Korean dressage rider. He competed at the 2016 Summer Olympics in Rio de Janeiro, where he placed 43rd in the individual competition aboard Bukowski. He also competed at the 2020 Olympic Games in Tokyo, where he finished 55th in the individual competition. Kim is a graduate of Dartmouth College. Kim took part at two World Equestrian Games (in 2014 and 2018). His best result was achieved in 2018, when he placed 47th.