| Millennium: | 1st millennium BC |
|---|---|
| Centuries: | 2nd century BC – 1st century BC – 1st century |
| Decades: | 110s BC 100s BC 90s BC – 80s BC – 70s BC 60s BC 50s BC |
| Years: | 86 BC 85 BC 84 BC – 83 BC – 82 BC 81 BC 80 BC |
| 83 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 83 BC |
| Ab urbe condita | 671 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1926 – -1925 |
| Bengali calendar | -675 |
| Berber calendar | 868 |
| Buddhist calendar | 462 |
| Burmese calendar | -720 |
| Byzantine calendar | 5426 – 5427 |
| Chinese calendar | [[Sexagenary cycle|]]年 (2554/2614) — to —
[[Sexagenary cycle|]]年(2555/2615) |
| Coptic calendar | -366 – -365 |
| Ethiopian calendar | -90 – -89 |
| Hebrew calendar | 3678 – 3679 |
| Hindu calendars | |
| - Bikram Samwat | -26 – -25 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3019 – 3020 |
| Holocene calendar | 9918 |
| Iranian calendar | 704 BP – 703 BP |
| Islamic calendar | 726 BH – 725 BH |
| Japanese calendar | |
| Korean calendar | 2251 |
| Thai solar calendar | 461 |
Year 83 BC was a year of the pre-Julian calendar.