The constitutional reforms of Sulla were a series of laws enacted by the Roman dictator Lucius Cornelius Sulla between 82 and 80 BC, reforming the constitution of the Roman Republic in a revolutionary way.

A Roman dictator was an extraordinary magistrate in the Roman Republic endowed with full authority to resolve some specific problem to which he had been assigned. He received the full powers of the state, subordinating the other magistrates, consuls included, for the specific purpose of resolving that issue, and that issue only, and then dispensing with those powers immediately.