Lucius Furius Medullinus (c. 445 BC – c. 375 BC), of the patrician gens Furia, was a politician and general of the Roman Republic who was consul twice and Consular Tribune seven times.
Medullinus was elected consul for the first time in 413 BC, together with Aulus Cornelius Cossus, although both Diodorus Siculus and Cassiodorus name his colleague as Marcus Cornelius Cossus. Medullinus headed the investigation (quaestio) into a mutiny that had occurred during the previous year, which had resulted in the death of the consular tribune Publius Postumius Albinus Regillensis. Passing judgement, the consuls found a few soldiers guilty, who were then forced into committing suicide.
Medullinus was then given command of the campaign against the Volsci, who had raided the territory of the Hernici, a people who were allied with the Roman Republic. He was unable to bring the Volsci to battle however, as they decided to withdraw back into their territory. Medullinus subsequently occupied the town of Ferentino; the town together with the surrounding territory was then handed over to the Hernici.
Medullinus’ second consulship came in 409 BC, where he was elected alongside Gnaeus Cornelius Cossus. During his consulship, due to the intervention of three Plebeian tribunes from the Icilius family, for the first time in the history of the Republic, three quaestors of plebeian extraction were elected. Strengthened by this success, the tribunes next opposed the raising of levies necessary to meet the raids of the Aequi and Volsci within the territory of the allied Latins and Hernici tribes, hoping thereby to obtain other concessions for the plebeians. Eventually it was agreed that in the following year (408 BC) consular tribunes would be elected; however, the Senate declared that it would accept no consular candidate who had been plebeian tribune that year, nor could any plebeian tribune be re-elected for the following year, thereby ensuring that no representative of the Icilius family could participate in those elections.