Lee Dong-keun (Hangul: ???; Korean pronunciation: [i.do?.g?n] or [i] [to?.g?n]; born 20 November 1990) is a Korean badminton player specializing in men's singles.
He won his first international senior title at the 2011 Vietnam International tournament.
In 2016, Lee represented his country compete at the Summer Olympics in Rio de Janeiro, Brazil.