|Centuries:||3rd century – 4th century – 5th century|
|Decades:||350s 360s 370s – 380s – 390s 400s 410s|
|Years:||380 381 382 – 383 – 384 385 386|
|383 by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishment and disestablishment categories|
|Establishments – Disestablishments|
|Ab urbe condita||1136|
|Bahá'í calendar||-1461 – -1460|
|English Regnal year||N/A|
|Chinese calendar||壬午年 (Water Horse)
3079 or 3019
— to —
癸未年 (Water Goat)
3080 or 3020
|- Vikram Samvat||439–440|
|- Shaka Samvat||305–306|
|- Kali Yuga||3484–3485|
|Igbo calendar||-617 – -616|
|Iranian calendar||239 BP – 238 BP|
|Islamic calendar||246 BH – 245 BH|
|Minguo calendar||1529 before ROC
|Thai solar calendar||926|
|Wikimedia Commons has media related to 383.|
Year 383 (CCCLXXXIII) 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 Merobaudes and Saturninus (or, less frequently, year 1136 Ab urbe condita). The denomination 383 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.
- Niall of the Nine Hostages becomes the first High King of Ireland
- Hadrian's Wall, the northern Roman frontier in Britain, is overrun by the Picts and falls into ruin.
- January 19 – Arcadius is elevated to Emperor.
- Roman troops in Britain proclaim Magnus Maximus Emperor. He crosses over to the continent and makes Trier his capital. Gaul, the Italian provinces and Hispania proclaim loyalty to him.
- August 25 – Emperor Gratian, age 24, is assassinated at Lugdunum (modern Lyon), leaving a young widow Laeta. Pannonia and Africa maintain their allegiance to co-emperor Valentinian II, now 12, whose mother, Justina, rules in his name.
- Emperor Theodosius I cedes Dacia and Macedonia to Valentinian II. They recognize Magnus Maximus as Augustus.
- Theodosius I sends Flavius Stilicho as an envoy to the Persian court of king Shapur III at Ctesiphon to negotiate a peace settlement relating to the partition of Armenia.
- Battle of Feishui: The Jin Dynasty defeats the Former Qin dynasty in Anhui.
- King Ardashir II dies after a 4-year reign. He is succeeded by his son Shapur III.
- First Council of Constantinople (some authorities date this council to 381): Theodosius I calls a general council to affirm and extend the Nicene creed, and denounce Arianism and Apollinarism. Most trinitarian Christian churches consider this an Ecumenical council.
- Eunomius of Cyzicus is banished to Moesia.
- Ardashir II, king of Persia
- August 25 – Gratian, Roman Emperor (assassinated)
- December 10 – Pope Damasus I
- Flavia Maxima Constantia, daughter of Constantius II
- Frumentius, the "Apostle to Ethiopia"
- Fu Rong, general of the Chinese Di state Former Qin
- Wulfila, Arian Gothic bishop
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