Demchuk (written: Демчуҝ) is a Ukrainian surname. Notable people with the name include:
Andrii Demchuk (born 1987), Ukrainian wheelchair fencer Andriy Demchuk (born 1974), Ukrainian weightlifter David Demchuk (born 19??), Canadian playwright and novelist Serhiy Demchuk (born 19??), Ukrainian paralympic swimmer
See also
Demchok (disambiguation) Demchugdongrub (sometimes spelled Demchukdonrov), the leader of the Japanese puppet state of Mengjiang