Marcius Censorinus was a name used by a branch of the plebeian gens Marcia of ancient Rome. The cognomen Censorinus was acquired through Gaius Marcius Rutilus, the first plebeian censor, whose son used it. The gens Marcia claimed descent from both Ancus Marcius, a king of Rome, and symbolically from Marsyas the satyr, who was associated with free speech and political liberty; see further discussion at Prophecy and free speech at Rome. The Marcii Censorini were consistent populares, supporting Marius, Cinna, Julius Caesar, and Antonius.