|Millennium:||1st millennium BC|
|286 BC by topic|
|Gregorian calendar||286 BC|
|Ab urbe condita||468|
|Ancient Egypt era||XXXIII dynasty, 38|
|- Pharaoh||Ptolemy I Soter, 38|
|Ancient Greek era||123rd Olympiad, year 3|
|Balinese saka calendar||N/A|
|Chinese calendar||甲戌年 (Wood Dog)|
2411 or 2351
— to —
乙亥年 (Wood Pig)
2412 or 2352
|Coptic calendar||−569 – −568|
|Ethiopian calendar||−293 – −292|
|- Vikram Samvat||−229 – −228|
|- Shaka Samvat||N/A|
|- Kali Yuga||2815–2816|
|Iranian calendar||907 BP – 906 BP|
|Islamic calendar||935 BH – 934 BH|
|Minguo calendar||2197 before ROC|
|Seleucid era||26/27 AG|
|Thai solar calendar||257–258|
−159 or −540 or −1312
— to —
−158 or −539 or −1311
Year 286 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Corvus (or Potitus) and Paetus (or, less frequently, year 468 Ab urbe condita). The denomination 286 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.
- As Demetrius Poliorcetes and his army are chased across Asia Minor to the Taurus Mountains by the armies of Lysimachus and Seleucus, in Greece his son Antigonus meets with success. Ptolemy's fleet is driven off and Athens surrenders to Antigonus.
- After allowing Pyrrhus of Epirus to remain in possession of Macedonia with the title of king, he is expelled by Lysimachus who declares himself its king in the place of Pyrrhus.
- The new law, Lex Aquilia, is enacted. This is a Roman law which provides compensation to the owners of property injured as a result of someone's fault.