| 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: | 89 BC 88 BC 87 BC – 86 BC – 85 BC 84 BC 83 BC |
| 86 BC by topic | |
| Politics | |
| State leaders – Sovereign states | |
| Birth and death categories | |
| Births – Deaths | |
| Establishments and disestablishments categories | |
| Establishments – Disestablishments | |
| Gregorian calendar | 86 BC |
| Ab urbe condita | 668 |
| Armenian calendar | N/A |
| Bahá'í calendar | -1929 – -1928 |
| Bengali calendar | -678 |
| Berber calendar | 865 |
| Buddhist calendar | 459 |
| Burmese calendar | -723 |
| Byzantine calendar | 5423 – 5424 |
| Chinese calendar | 甲年 (2551/2611) — to —
[[Sexagenary cycle|]]年(2552/2612) |
| Coptic calendar | -369 – -368 |
| Ethiopian calendar | -93 – -92 |
| Hebrew calendar | 3675 – 3676 |
| Hindu calendars | |
| - Bikram Samwat | -29 – -28 |
| - Shaka Samvat | N/A |
| - Kali Yuga | 3016 – 3017 |
| Holocene calendar | 9915 |
| Iranian calendar | 707 BP – 706 BP |
| Islamic calendar | 729 BH – 728 BH |
| Japanese calendar | |
| Korean calendar | 2248 |
| Thai solar calendar | 458 |
Year 86 BC was a year of the pre-Julian calendar.