|Millennium:||1st millennium BC|
|Centuries:||4th century BC – 3rd century BC – 2nd century BC|
|Decades:||310s BC 300s BC 290s BC – 280s BC – 270s BC 260s BC 250s BC|
|Years:||286 BC 285 BC 284 BC – 283 BC – 282 BC 281 BC 280 BC|
|283 BC by topic|
|Gregorian calendar||283 BC|
|Ab urbe condita||471|
|Ancient Egypt era||XXXIII dynasty, 41|
|- Pharaoh||Ptolemy II Philadelphus, 1|
|Ancient Greek era||124th Olympiad, year 2|
|Chinese calendar||丁丑年 (Fire Ox)
2414 or 2354
— to —
戊寅年 (Earth Tiger)
2415 or 2355
|Coptic calendar||−566 – −565|
|Ethiopian calendar||−290 – −289|
|- Vikram Samvat||−226 – −225|
|- Shaka Samvat||N/A|
|- Kali Yuga||2819–2820|
|Iranian calendar||904 BP – 903 BP|
|Islamic calendar||932 BH – 931 BH|
|Minguo calendar||2194 before ROC
|Seleucid era||29/30 AG|
|Thai solar calendar||260–261|
|Wikimedia Commons has media related to 283 BC.|
Year 283 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Dolabella and Maximus (or, less frequently, year 471 Ab urbe condita). The denomination 283 BC 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.
- Following Demetrius Poliorcetes' death in captivity as a prisoner of Seleucus, his son Antigonus assumes the title of King of Macedonia, though in name only, as King Lysimachus of Thrace is in control of Macedonia. Demetrius' remains are given to Antigonus and he is honoured with a grand funeral in Corinth. After this, Demetrius is interred in the town of Demetrias which he had founded.
- Consuls: Publius Cornelius Dolabella and Gnaeus Domitius Calvinus Maximus.
- At the Battle of Lake Vadimo, Roman forces finally quell the allied Etruscans and Gauls. The Roman army is led by consul Publius Cornelius Dolabella. Rome is at last undisputed master of northern and central Italy.
- The canal from the Nile River to the Red Sea, initially started but not completed by the Egyptian pharaoh Necho II and repaired by the Persian king Darius I, is again repaired and made operational by Ptolemy II.
- Ptolemy II enlarges the library at Alexandria and appoints the grammarian Zenodotus to collect and edit all the Greek poets.
- Demetrius I Poliorcetes, King of Macedonia (b. 336 BC)
- Ptolemy I Soter, Macedonian general who served under Alexander the Great and became ruler of Egypt and founder of the Ptolemaic dynasty (b. 367 BC)