Dumesny is a surname. Notable people with the name include:
Max Dumesny (born 1959), Australian Sprintcar driver Louis Gaulard Dumesny (fl. 1677–1702), French operatic tenor Pierre Joseph Michel Salomon Dumesny (1739–1803), French general during the Battle of Hondschoote (1793)
See also Dumesnil (disambiguation)