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Year 93 BC was a year of the pre-Julian Roman calendar. At the time it was known as the Year of the Consulship of Flaccus and Herennius (or, less frequently, year 661 Ab urbe condita). The denomination 93 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.

• Roman consuls: Gaius Valerius Flaccus and Marcus Herennius.

• Ariobarzanes I Philoromaios becomes king of Cappadocia with Roman backing.
• Arshak I becomes king of Caucasian Iberia after overthrowing Farnadjom.

• End of era Taishi of Emperor Wu of Han China.

• A severe plague kills "half the population" of Japan.^[1]

• Publius Clodius Pulcher, Roman politician (d. 52 BC)

• Antiochus XI, king of the Seleucid Empire
• Farnadjom, king of Caucasian Iberia