21 BC

Year 21 BC was either a common year starting on Monday, Tuesday or Wednesday or a leap year starting on Tuesday of the Julian calendar. At the time, it was known as the Year of the Consulship of Lollius and Lepidus.

 Events 
 Marcus Vipsanius Agrippa divorces Claudia Marcella.  He then marries Julia the Elder, daughter of Caesar Augustus.

 Births 

 Naevius Sutorius Macro, Roman politician (d. AD 38)