Dubeau is a surname. Notable people with the surname include:
Angèle Dubeau (born 1962), Canadian retired classical violinist Dan Dubeau, chief human resources officer, deputy commissioner and former acting commissioner of the Royal Canadian Mounted Police (2017–2018) Ernie Dubeau (1882–1951), Canadian ice hockey player Joseph Adélard Dubeau (1873–1937), Canadian politician Philippe Dubeau (born 1948), French classical organist and politician, former mayor of the commune of Pageas