Dmytro Mykolayovych Ianchuk (Ukrainian: Дмитро Миколайович Янчук; born 14 November 1992) is a Ukrainian sprint canoeist.

He is the 2016 Olympic bronze medalist in the C-2 1000 metres event, the 2015 World bronze medalist in C-2 500 metres, and the 2015 European champion in C-2 1000 m. Ianchuk competes together with Taras Mishchuk.

Ianchuk took up canoeing in 2004 following his brother. He has a degree in health studies from the Khmelnytskyi National University.

At the 2016 Olympic Games, Dmytro Yanchuk, along with Taras Mishchuk, finished second in the first race, behind the Brazilian crew, and reached the final after winning the semifinals. In the final race, the Ukrainians finished third with a time of 3 minutes 45.949 seconds, again lagging behind the Brazilians and letting the German crew take first place.

At the 2020 Olympic Games in Tokyo, he took 13th place in the canoe double with Pavlo Altukhov C-2 1000m 13th place.