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
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) [[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

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)