Do Dong-hyun (born 19 November 1993) is a South Korean footballer who plays as an attacking midfielder.
Do signed a three-year deal with Australian A-League club Brisbane Roar on 17 July 2012, making him the youngest player to occupy a Visa spot in the A-League.
On 17 July 2013, Dong-Hyun signed for J2 League team FC Gifu, where he made 5 appearances for the team.
Dong-Hyun was drafted by NorthEast United in the Inaugural Indian Super League draft on 21 August 2014.
He joined East Bengal in 2015 for the 2015–16 I-League. Do started the season for the Kolkata-based team in the 2015 Calcutta Football League where scored 12 goals in 10 matches, helping his team to the title, including a brace (both from free-kicks) in the 4-0 derby win over Mohun Bagan.
He made his I-League debut for East Bengal on 10 January 2016 and recorded an assist in East Bengal's 3-1 win over Sporting Club de Goa. He also played an important role in the return league of 2015-16 I-League in the match against arch rivals Mohun Bagan as he scored two goals one from a spot-kick and the other one by dancing past two defenders at Kanchenjunga Stadium of Siliguri.
On 17 November 2016 it was announced that Do had been released by East Bengal after failing to impress head coach Trevor Morgan.