Lucius Quinctius (born c. 124 BC) was a politician of the late Roman Republic. A homo novus associated with the populares, he was tribune of the plebs in 74 BC and praetor in 67 BC.Quinctius is characterised by Cicero as a man well fitted to speak in public assemblies (Cic. Brut. 62). He distinguished himself by his violent opposition to the constitutional reforms of Lucius Cornelius Sulla, and endeavoured to regain for the tribunes the power of which they had been deprived.