|411 by topic|
|Ab urbe condita||1164|
|Balinese saka calendar||332–333|
|Chinese calendar||庚戌年 (Metal Dog)
3107 or 3047
— to —
辛亥年 (Metal Pig)
3108 or 3048
|- Vikram Samvat||467–468|
|- Shaka Samvat||332–333|
|- Kali Yuga||3511–3512|
|Iranian calendar||211 BP – 210 BP|
|Islamic calendar||218 BH – 216 BH|
|Minguo calendar||1501 before ROC
|Seleucid era||722/723 AG|
|Thai solar calendar||953–954|
537 or 156 or −616
— to —
538 or 157 or −615
|Wikimedia Commons has media related to 411.|
Year 411 (CDXI) was a common year starting on Sunday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Theodosius without colleague (or, less frequently, year 1164 Ab urbe condita). The denomination 411 for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- Emperor Honorius sends two Roman generals to deal with the usurper Constantine III in Gaul. They kill Gerontius, Constantine's rebellious general (magister militum) in Spain, then besiege Arles and defeat Constantine. He is taken prisoner and put to death at Ravenna.
- Following the defeat of the Constantine III, the Burgundians and the Gallic nobility proclaim Jovinus, Gallo-Roman senator, emperor of the Western Roman Empire at Mogontiacum (modern Mainz).
- King Ataulf leads the Goths into Gaul at the instigation of Honorius, who promises to recognise a Visigothic Kingdom if he defeats the several usurpers who threaten the Roman Empire.
- The Alans establish their rule in the Roman province of Lusitania (Portugal south of the Duero River and Spain).
- The Teutonic tribes in Spain join the Roman Empire as foederati (allies with military commitments).
- September 18 – Constantine III, Roman usurper
- Constans II, usurper and son of Constantine III
- Gerontius, Roman general
- Gundomar I, king of Burgundy
- Yax Nuun Ayiin I, king of Tikal (Guatemala) (approximate date)