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|449 by topic|
|Ab urbe condita||1202|
|Balinese saka calendar||370–371|
|Chinese calendar||戊子年 (Earth Rat)|
3145 or 3085
— to —
己丑年 (Earth Ox)
3146 or 3086
|- Vikram Samvat||505–506|
|- Shaka Samvat||370–371|
|- Kali Yuga||3549–3550|
|Iranian calendar||173 BP – 172 BP|
|Islamic calendar||178 BH – 177 BH|
|Minguo calendar||1463 before ROC|
|Seleucid era||760/761 AG|
|Thai solar calendar||991–992|
575 or 194 or −578
— to —
576 or 195 or −577
Year 449 (CDXLIX) was a common year starting on Saturday (link will display the full calendar) of the Julian calendar. At the time, it was known as the Year of the Consulship of Astyrius and Romanus (or, less frequently, year 1202 Ab urbe condita). The denomination 449 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 Valentinian III sends an embassy to Attila the Hun. The purpose of the meeting is a long-running dispute over spoils of war during the Danube offensive (441–442). Attila claims his lost property, but Valentinian and Flavius Aetius (magister militum) refuse this request.
- Flavius Orestes, Roman aristocrat, is sent to Attila's court and becomes a high-ranking secretary (notarius). He is the father of the future emperor Romulus Augustulus.
- Vortigern, king of the Britons, forms an alliance with Hengist and Horsa, by tradition chieftains of the Jutes, who led the Anglo-Saxon invasion of Britain (approximate date).
- August 3 – The Second Council of Ephesus opens, chaired by Dioscorus, patriarch of Alexandria. Flavian, patriarch of Constantinople, and Domnus II, patriarch of Antioch, are deposed on August 8.
- October – A Roman synod repudiates all the decisions of the Second Council of Ephesus.
- Anatolius becomes patriarch of Constantinople.
- Maximus II becomes patriarch of Antioch.
- February 25 – Emperor Qianfei, emperor of the Liu Song dynasty (d. 466)
- Eugendus, abbot of Condat Abbey (approximate date)
- Kavadh I, king of the Persian Empire (d. 531)
- Eucherius, bishop of Lyon (approximate date)
- August 11 – Flavian, patriarch of Constantinople
- Hilary, bishop of Arles (b. 403)