| 265 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 265 BC |
| Ab urbe condita | 489 |
| Armenian calendar | N/A |
| Assyrian calendar | 4486 |
| Bahá'í calendar | -2108–-2107 |
| Bengali calendar | -857 |
| Berber calendar | 686 |
| English Regnal year | N/A |
| Buddhist calendar | 280 |
| Burmese calendar | -902 |
| Byzantine calendar | 5244–5245 |
| Chinese calendar | 乙未年 (2372/2432) — to —
丙申年(2373/2433) |
| Coptic calendar | -548–-547 |
| Ethiopian calendar | -272–-271 |
| Hebrew calendar | 3496–3497 |
| Hindu calendars | |
| - Vikram Samvat | -208–-207 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2837–2838 |
| Holocene calendar | 9736 |
| Iranian calendar | 886 BP – 885 BP |
| Islamic calendar | 913 BH – 912 BH |
| Japanese calendar | |
| Korean calendar | 2069 |
| Minguo calendar | 2176 before ROC 民前2176年 |
| Thai solar calendar | 279 |
Year 265 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Gurges and Vitulus (or, less frequently, year 489 Ab urbe condita). The denomination 265 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.