Marcus Aemilius Lepidus (; c. 89 BC – late 13 or early 12 BC) was a Roman general and statesman who formed the Second Triumvirate alongside Octavian and Mark Antony during the final years of the Roman Republic. Lepidus had previously been a close ally of Julius Caesar. He was also the last pontifex maximus before the Roman Empire, and (presumably) the last interrex and magister equitum to hold military command.

Though he was an able military commander and proved a useful partisan of Caesar, Lepidus has always been portrayed as the least influential member of the Triumvirate. He typically appears as a marginalised figure in depictions of the events of the era, most notably in Shakespeare's plays. While some scholars have endorsed this view, others argue that the evidence is insufficient to discount the distorting effects of propaganda by his opponents, principally Cicero and, later, Augustus.