Felicissimus (died 271?) was a public officer in Ancient Rome, during the reign of Emperor Aurelian. He is famous because he led an uprising of mint workers against the Emperor, but was defeated and killed, possibly in 274, but more probably in 271. The fact that the mint of Rome was inactive for a short time before the monetary reform of 274 could be a consequence of this revolt, and the poor quality of the coinage at the beginning of Aurelian's reign supports the suggestion that the workers at the mint were adulterating the coinage.