Andrii Demchuk (born 14 December 1987) is a Ukrainian wheelchair fencer who competes in épée, foil and sabre. He represented Ukraine at the 2016 Summer Paralympics and he won the gold medal in the event. He also represented Ukraine at the 2012 Summer Paralympics without winning a medal. In the November 2019 event of the IWAS Wheelchair Fencing World Cup he won the silver medal in the men's sabre A event.