40s BC

Template:Short description Template:Image frame Template:Decadebox BC This article concerns the period 49 BC – 40 BC. Template:Events by year for decade BC

Significant people

• Julius Caesar, Roman dictator (lived 100–44 BC, term 46–44 BC)
• Marcus Junius Brutus, Roman politician (85–42 BC)
• Mark Antony, Roman politician and general (83–30 BC)
• Pharaoh Cleopatra VII of Egypt (lived 70/69–30 BC, reigned 51–30 BC)—enters her twenties, has son Caesarion with Julius Caesar, before meeting Mark Antony
• Gaius Iulius Caesar Octavianus, Roman politician and general (62 BC–AD 14)
• Pharaoh Ptolemy XV Caesarion (lived 47–30 BC, reigned 44–30 BC)
• Gaius Cassius Longinus, Roman politician (died 42 BC)