|Millennium:||1st millennium BC|
|39 BC by topic|
|Gregorian calendar||39 BC
|Ab urbe condita||715|
|Ancient Egypt era||XXXIII dynasty, 285|
|- Pharaoh||Cleopatra VII, 13|
|Ancient Greek era||185th Olympiad, year 2|
|Chinese calendar||辛巳年 (Metal Snake)
2658 or 2598
— to —
壬午年 (Water Horse)
2659 or 2599
|Coptic calendar||−322 – −321|
|Ethiopian calendar||−46 – −45|
|- Vikram Samvat||18–19|
|- Shaka Samvat||N/A|
|- Kali Yuga||3062–3063|
|Iranian calendar||660 BP – 659 BP|
|Islamic calendar||680 BH – 679 BH|
|Julian calendar||39 BC
|Minguo calendar||1950 before ROC
|Seleucid era||273/274 AG|
|Thai solar calendar||504–505|
|Wikimedia Commons has media related to 39 BC.|
Year 39 BC was either a common year starting on Friday, Saturday or Sunday or a leap year starting on Saturday (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 Saturday of the Proleptic Julian calendar. At the time, it was known as the Year of the Consulship of Censorinus and Sabinus (or, less frequently, year 715 Ab urbe condita). The denomination 39 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.
- Marcus Antonius dispatched Publius Ventidius Bassus with 11 legions to the East and drives Quintus Labienus out of Asia Minor, he retreats into Syria, where he received Parthian reinforcements. Ventidius finally defeats him in the battle at the Taurus Mountains.
- Publius Ventidius defeats Pharnastanes with his cataphracts at the Amanus Gates, and goes on to reclaim Syria, Phoenicia and Judea. Labienus flees to Cilicia, where he is captured and executed.
- Sextus Pompey, styled himself "son of Neptune", controlled Sicily, Sardinia, Corsica and the Peloponnesus is recognized by the Triumvirate in the Pact of Misenum. The pact helped to assure Rome's grain supply, the blockade on Italy is lifted.
- Antonia Major, daughter of Mark Antony, grandmother of Nero and Messalina (d. bef. AD 25)
- Julia the Elder, daughter of Caesar Augustus (d. AD 14)
- Quintus Labienus (murdered)