|Millennium:||1st millennium BC|
|70 BC by topic|
|Wikimedia Commons has media related to 70 BC.|
Year 70 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Magnus and Dives (or, less frequently, year 684 Ab urbe condita). The denomination 70 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.
- August – In Rome, Cicero prosecutes former governor Verres; Verres exiles himself to Marseille before the trial is over.
- The office of censor is reinstated in the Roman Republic.
- Lucullus captures Sinop, then invades Armenia.
- October 15 – Virgil, Roman poet (d. 19 BC)
- December – Cleopatra VII of Egypt (or January 69 BC) (d. 30 BC)
- Publius Cornelius Dolabella, Roman general (d. 43 BC)
- Maecenas, Roman politician and patron (d. 8 BC)