• Born year: 0320
  • Born in: n.a.
  • Death year: 0350
  • Death in: Gaul

Constans (Latin: Flavius Julius Constans Augustus) (c.323–350) was Roman Emperor from 337 to 350. He defeated his brother Constantine II in 340, but anger in the army over his personal life and preference for his barbarian bodyguards led the general Magnentius to rebel, resulting in the assassination of Constans in 350.