Dumoulin is a surname of French origin similar to Desmoulins, see the latter article for the etymology. People with that name include:
- Brian Dumoulin (b. 1991), American ice hockey player
- Charles Dumoulin (1500âÂÂ1566), French jurist
- (1768âÂÂ1825), French general
- (1811âÂÂ1858), French hydrographer
- Cyril Dumoulin (b. 1984), French handball player
- (16??âÂÂafter 1751), French dancer
- François Aimé Louis Dumoulin (1753âÂÂ1834), Swiss painter and engraver
- Franck Dumoulin (b. 1973), French pistol shooter
- (1877âÂÂ1963), French politician
- (b. 1934), French director
- (1924âÂÂ2016), French science fiction writer
- Marcel Dumoulin (1905âÂÂ1981), French weightlifter
- (b. 1985), Canadian ice hockey player
- , French historian
- Paul Dumoulin (1827âÂÂ1859), French painter and caricaturist
- Pierre Du Moulin (1568âÂÂ1658), French theologian, and Huguenot minister
- (1749âÂÂ1809), French general
- (1883âÂÂ1944), Belgian painter and engraver
- Samuel Dumoulin (b. 1980), French road bicycle racer
- Tom Dumoulin (b. 1990), Dutch road bicycle racer