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 v • d • e

86 BC in other calendars

Gregorian calendar	86 BC
Ab urbe condita	668
Armenian calendar	N/A
Bahá'í calendar	-1929 – -1928
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
- Vikram Samvat	-30 – -29
- 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
v • d • e

Year 86 BC was a year of the pre-Julian calendar.

Events

By place

Rome

• First Mithridatic War
  • March 1 — Sulla captured Athens from the Pontic army, removing the tyrant Aristion.
  • Lucius Licinius Lucullus decisively defeated the Mithridatic fleet in the Battle of Tenedos.
  • The Roman forces of Lucius Cornelius Sulla defeat the Pontic forces of Archelaus in the Battle of Chaeronea.

Births

• October 1 — Sallust, Roman historian (d. 34 BC)

Deaths

• January 13 — Gaius Marius, Roman general and politician (b. 157 BC)
• After March 1 — Aristion, philosopher and tyrant of Athens
• Sima Qian, Chinese historian (b. 145 BC)