89 BC

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:	92 BC 91 BC 90 BC – 89 BC – 88 BC 87 BC 86 BC

89 BC by topic
Politics
State leaders – Sovereign states
Birth and death categories
Births – Deaths
Establishments and disestablishments categories
Establishments – Disestablishments

**89 BC in other calendars**
Gregorian calendar	89 BC
Ab urbe condita	665
Armenian calendar	N/A
Bahá'í calendar	-1932 – -1931
Bengali calendar	-681
Berber calendar	862
Buddhist calendar	456
Burmese calendar	-726
Byzantine calendar	5420 – 5421
Chinese calendar	[[Sexagenary cycle\|]]年 (2548/2608) — to — [[Sexagenary cycle\|]]年 (2549/2609)
Coptic calendar	-372 – -371
Ethiopian calendar	-96 – -95
Hebrew calendar	3672 – 3673
Hindu calendars
- Bikram Samwat	-32 – -31
- Shaka Samvat	N/A
- Kali Yuga	3013 – 3014
Holocene calendar	9912
Iranian calendar	710 BP – 709 BP
Islamic calendar	732 BH – 731 BH
Japanese calendar
Korean calendar	2245
Thai solar calendar	455

Year 89 BC was a year of the pre-Julian calendar.

Events

Consuls: Gnaeus Pompeius Strabo and Lucius Porcius Cato
Social War:
- Roman forces under Lucius Porcius Cato are defeated by the Italian rebels in the Battle of Fucine Lake, Cato is killed.
- The Roman army of Gnaeus Pompeius Strabo decisively defeats the rebels in the Battle of Asculum.
Lex Plautia Papiria extends citizenship to all Italians who applied for it within 60 days. The new citizens are enrolled in eight designated tribes, to prevent domination of the assemblies.
Lex Pompeia grants Latin rights to cities in Cisalpine Gaul.
Cicero ends his service in the Roman army.

Mithridates VI of Pontus invades Bithynia and Cappadocia, thus the First Mithridatic War begins.