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:	84 BC 83 BC 82 BC - 81 BC - 80 BC 79 BC 78 BC

81 BC by topic

Politics

State leaders - Sovereign states

Birth and death categories

Births - Deaths

Establishments and disestablishments categories

Establishments - Disestablishments v • d • e

81 BC in other calendars

Gregorian calendar	81 BC
Ab urbe condita	673
Armenian calendar	N/A
Bahá'í calendar	-1924 – -1923
Berber calendar	870
Buddhist calendar	464
Burmese calendar	-718
Byzantine calendar	5428 – 5429
Chinese calendar	[[Sexagenary cycle|]]年 (2556/2616) — to — 子年 (2557/2617)
Coptic calendar	-364 – -363
Ethiopian calendar	-88 – -87
Hebrew calendar	3680 – 3681
Hindu calendars
- Vikram Samvat	-25 – -24
- Shaka Samvat	N/A
- Kali Yuga	3021 – 3022
Holocene calendar	9920
Iranian calendar	702 BP – 701 BP
Islamic calendar	724 BH – 723 BH
Japanese calendar
Korean calendar	2253
Thai solar calendar	463
v • d • e

Year 81 BC was a year of the pre-Julian calendar.

Events

By place

Rome

• Sulla is appointed dictator and reforms the Roman government.
• The Second Mithridatic War ended with the status quo.
• Cicero wins his first case.

Births

Deaths

• Arshak I of Iberia