158 BC

Millennium:	1st millennium BC
Centuries:	3rd century BC – 2nd century BC – 1st century BC
Decades:	180s BC 170s BC 160s BC – 150s BC – 140s BC 130s BC 120s BC
Years:	161 BC 160 BC 159 BC – 158 BC – 157 BC 156 BC 155 BC

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

**158 BC in other calendars**
Gregorian calendar	158 BC
Ab urbe condita	596
Armenian calendar	N/A
Bahá'í calendar	-2001 – -2000
Bengali calendar	-750
Berber calendar	793
Buddhist calendar	387
Burmese calendar	-795
Byzantine calendar	5351 – 5352
Chinese calendar	[[Sexagenary cycle\|]]年 (2479/2539) — to — [[Sexagenary cycle\|]]年 (2480/2540)
Coptic calendar	-441 – -440
Ethiopian calendar	-165 – -164
Hebrew calendar	3603 – 3604
Hindu calendars
- Bikram Samwat	-101 – -100
- Shaka Samvat	N/A
- Kali Yuga	2944 – 2945
Holocene calendar	9843
Iranian calendar	779 BP – 778 BP
Islamic calendar	803 BH – 802 BH
Japanese calendar
Korean calendar	2176
Thai solar calendar	386

Events

At the request of the Romans, Ariarathes V, king of Cappadocia, rejects a proposal from the Seleucid king, Demetrius I, for him to marry the sister of Demetrius I. In response, Seleucid forces attack Cappadocia and remove Ariarathes V from the Cappadocian throne. Demetrius I then replaces him with Orophernes Nicephorus, a supposed son of the late king, Ariarathes IV. With Ariarathes V deprived of his kingdom, he flees to Rome.
Attalus II Philadelphus, the second son of Attalus I Soter of Pergamum, ascends the throne following the death of his elder brother, Eumenes II.

Publius Rutilius Rufus, Roman consul, statesman, orator and historian (d. c. 78 BC)

Eumenes II, King of Pergamum who has ruled since 197 BC and a member of the Attalid dynasty; a brilliant statesman, he has brought his small kingdom to the peak of its power and made Pergamum a great centre of Greek culture in Anatolia