Constantius

Constantius may refer to:

  • Constantius I, Roman emperor 305–306
  • Constantius II, Roman emperor 337–361
  • Constantius III, Roman co-emperor in 421
  • Constantius (consul 327), consul in 327
  • Constantius Gallus (c.325–354), member of the Constantinian dynasty and Caesar of the Roman Empire (351–354); consul from 352 to 354
  • Saint Constantius of Perugia (died c. 170), one of the patron saints of Perugia, Italy
  • Saint Constantius of Aquino (6th century), bishop of Aquino
  • Saint Constantius of Capri, bishop of Capri
  • Saint Constantius (Theban Legion)
  • Saints Simplicius, Constantius and Victorinus
  • Constantius of Lyon, 5th century priest
  • Constantius Africanus, (c. 1020–1085), eleventh-century translator of Greek and Islamic medical texts