|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:||138 BC 137 BC 136 BC – 135 BC – 134 BC 133 BC 132 BC|
|135 BC by topic|
|Gregorian calendar||135 BC|
|Ab urbe condita||619|
|Bahá'í calendar||−1978 – −1977|
|English Regnal year||N/A|
乙巳年 (Wood Snake)
2562 or 2502
— to —
丙午年 (Fire Horse)
2563 or 2503
|Coptic calendar||−418 – −417|
|Ethiopian calendar||−142 – −141|
|- Vikram Samvat||−78 – −77|
|- Shaka Samvat||N/A|
|- Kali Yuga||2967–2968|
|Igbo calendar||−1134 – −1133|
|Iranian calendar||756 BP – 755 BP|
|Islamic calendar||779 BH – 778 BH|
2046 before ROC
|Thai solar calendar||409|
Year 135 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Flaccus and Piso (or, less frequently, year 619 Ab urbe condita). The denomination 135 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.
- Han Dynasty China intervenes in a war between the Minyue and Nanyue during its expansion southward.
- A Han military campaign against the Dian Kingdom established a military commandery in the Yunnan region.
- The First Servile War starts.
- Sima Qian, Chinese historian (or 145 BC) (d. 86 BC)
- Posidonius of Apamea, Greek Stoic philosopher and scientist (d. 51 BC)
- Menander I, King of the Indo-Greek Kingdom
- Simon Maccabaeus, prince of Judea and High Priest of Judea
- "World History 200- 100 BC". Retrieved 28 June 2010.