|Millennium:||1st millennium BC|
|Centuries:||3rd century BC – 2nd century BC – 1st century BC|
|Decades:||160s BC 150s BC 140s BC – 130s BC – 120s BC 110s BC 100s BC|
|Years:||140 BC 139 BC 138 BC – 137 BC – 136 BC 135 BC 134 BC|
|137 BC by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Gregorian calendar||137 BC|
|Ab urbe condita||617|
|Bahá'í calendar||−1980 – −1979|
|English Regnal year||N/A|
|Chinese calendar||癸卯年 (Water Rabbit)
2560 or 2500
— to —
甲辰年 (Wood Dragon)
2561 or 2501
|Coptic calendar||−420 – −419|
|Ethiopian calendar||−144 – −143|
|- Vikram Samvat||−80 – −79|
|- Shaka Samvat||N/A|
|- Kali Yuga||2965–2966|
|Igbo calendar||−1136 – −1135|
|Iranian calendar||758 BP – 757 BP|
|Islamic calendar||781 BH – 780 BH|
|Minguo calendar||2048 before ROC
|Thai solar calendar||407|
|Wikimedia Commons has media related to 137 BC.|
Year 137 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Porcina and Mancinus (or, less frequently, year 617 Ab urbe condita). The denomination 137 BC for this year has been used since the early medieval period, when the Anno Domini calendar era became the prevalent method in Europe for naming years.
- Slaves led by Eunus of Apamea in Sicily revolt against the Romans in an event called the First Servile War.
- Tiberius Gracchus, quaestor in Spain, observes that slave labor has displaced small freeheld farms.
- Valencia is founded.
- Numantine War begun, Quintus Pompeius and M. Papilius Laenas were defeated and disgraced by the Numantians in subsequent years.
- Q. Pompeius is brought to trial by Q.Metellus and others, but acquitted.