Dunkin is a surname. Notable people with the surname include:
Christopher Dunkin, PC (1812–1881), Canadian editor, lawyer, teacher, judge, and politicianEdwin Dunkin FRS, (1821–1898), British astronomerKenneth Dunkin, (born 1966), Democratic member of the Illinois House of RepresentativesRobert Dunkin (1761–1831), mentor of the young Humphry DavyTony Dunkin (born 1970), American basketball playerWilliam Dunkin (1709–1765), Irish poet