Đỗ Duy Mạnh (born 29 September 1996) is a Vietnamese professional footballer who plays as a centre-back for V.League 1 club Hà Nội and the Vietnam national team.

On December of the same year, Duy Mạnh along with his teammate Phạm Đức Huy had a trial with J2 League club Consadole Sapporo.

He putted on a solid performance when replacing injured captain Lương Xuân Trường at 2014 AFC U-19 Championship qualification,[8] but he was dropped from the squad later on in the final tournament.

[9] In March 2015, Đỗ Duy Mạnh was called up to Vietnam U23 for 2016 AFC U-23 Championship qualification but his injury kept him out until the last group game against Macau.

[11] On 8 March 2015, Đỗ Duy Mạnh made his debut for the senior Vietnam team at 2018 FIFA World Cup qualification (AFC) game against Iraq.