Gaius Maenius (possibly Gaius Maenius Antiaticus) was a Roman statesman and general who was elected consul in 338 BC and appointed dictator twice, in 320 BC and 314 BC.
Hailing from a plebeian family, Maenius was elected consul in 338 BC alongside Lucius Furius Camillus during the final stages of the Second Latin War. He commanded the Roman naval forces which defeated the combined Latin armies of Antium, Lanuvium, Aricia and Velitrae. at the Battle of Antium on the river Astura, thereby completing the conquest of Latium. After this victory, he took the sixrostra (rams) from the prows of the enemy warships, and placed them in what became known as the Rostra, decorating the stage in the Roman Forum from which the orators would address the people. After this victory, both Maenius and his colleague were awarded triumphs, and in a rare show of appreciation, both had equestrian statues erected to them in the Roman Forum. His statue was placed upon a column, called the Columna Maenia, which stood near the end of the Forum, on the Capitoline. In addition, it is also possible that he took the cognomen Antiaticus in remembrance of this victory.
In 320 BC, Maenius was appointed dictator, for the purpose of investigating a number of plots and conspiracies involving some of the most prominent of Roman noble families, together with the leading citizens of Capua. Maenius appointed Marcus Foslius Flaccinator as his magister equitum, and both men proceeded to investigate the matter thoroughly, to the point that many of the Roman nobility began to resent his uncovering their plots, while Capua proceeded to revolt against Rome in 319 BC. The situation soon reached crisis point, as the Roman nobility demanded that charges be laid against both Maenius and Foslius. Both men resigned their office and demanded that the consuls, Lucius Papirius Cursor and Quintus Publilius Philo give them a trial. The consuls agreed, and both men were acquitted.