|Millennium:||1st millennium BC|
|Centuries:||2nd century BC – 1st century BC – 1st century|
|Decades:||30s BC 20s BC 10s BC – 0s BC – 0s 10s 20s|
|Years:||5 BC 4 BC 3 BC – 2 BC – 1 BC 1 AD 2 AD|
|2 BC by topic|
|State leaders – Sovereign states|
|Birth and death categories|
|Births – Deaths|
|Establishments and disestablishments categories|
|Establishments – Disestablishments|
|Gregorian calendar||2 BC|
|Ab urbe condita||752|
|Bahá'í calendar||−1845 – −1844|
|English Regnal year||N/A|
|Chinese calendar||戊午年 (Earth Horse)
2695 or 2635
— to —
己未年 (Earth Goat)
2696 or 2636
|Coptic calendar||−285 – −284|
|Ethiopian calendar||−9 – −8|
|- Vikram Samvat||55–56|
|- Shaka Samvat||N/A|
|- Kali Yuga||3100–3101|
|Igbo calendar||−1001 – −1000|
|Iranian calendar||623 BP – 622 BP|
|Islamic calendar||642 BH – 641 BH|
|Julian calendar||2 BC|
|Minguo calendar||1913 before ROC
|Thai solar calendar||542|
|Wikimedia Commons has media related to 2 BC.|
Year 2 BC was a common year starting on Thursday or Friday (link will display the full calendar) of the Julian calendar (the sources differ, see leap year error for further information) and a common year starting on Wednesday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Augustus and Silvanus[disambiguation needed] (or, less frequently, year 752 Ab urbe condita). The denomination 2 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.
- Emperor Augustus is proclaimed Pater Patriae, or "father of the country" by the Roman Senate; this bestowed title is the logical consequence and final proof of Augustus' supreme position as princeps, the first in charge over the Roman state.
- Julia the Elder, daughter of Augustus, is exiled on charges of treason and adultery to Pandateria; her mother Scribonia accompanies her.
- The Aqua Alsietina Roman aqueduct is constructed.
- Phraates V becomes king of the Parthian Empire, after he and his mother "the goddess Musa" have murdered his father Phraates IV.
- Jesus, Son of God, and basis of Christianity (born in the month of Ethanim (Tishrei) (September–October)) (approximate date, according to Eusebius of Caesarea and Jehovah's Witnesses)
- The Apostle Peter, Jesus's closest follower, was born around this year (d. 64 AD)
- Iullus Antonius, son of Mark Antony and consul in 10 BC (executed for treason) (b. 43 BC)
- Phraates IV, king of Parthia (murdered)