| 125 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 125 BC |
| Ab urbe condita | 629 |
| Armenian calendar | N/A |
| Assyrian calendar | 4626 |
| Bahá'í calendar | -1968–-1967 |
| Bengali calendar | -717 |
| Berber calendar | 826 |
| English Regnal year | N/A |
| Buddhist calendar | 420 |
| Burmese calendar | -762 |
| Byzantine calendar | 5384–5385 |
| Chinese calendar | 乙卯年 (2512/2572) — to —
丙辰年(2513/2573) |
| Coptic calendar | -408–-407 |
| Ethiopian calendar | -132–-131 |
| Hebrew calendar | 3636–3637 |
| Hindu calendars | |
| - Vikram Samvat | -68–-67 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 2977–2978 |
| Holocene calendar | 9876 |
| Iranian calendar | 746 BP – 745 BP |
| Islamic calendar | 769 BH – 768 BH |
| Japanese calendar | |
| Korean calendar | 2209 |
| Minguo calendar | 2036 before ROC 民前2036年 |
| Thai solar calendar | 419 |
Year 125 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Hypsaeus and Flaccus (or, less frequently, year 629 Ab urbe condita). The denomination 125 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.