The Battle of Tauroento was a naval battle fought off the coast of Tauroento during Caesar's Civil War. Following a successful naval battle outside Massilia, the Caesarian fleet commanded by Decimus Junius Brutus Albinus once again came into conflict with the Massiliot fleet and a Pompeian relief fleet led by Quintus Nasidius on 31 July 49 BC. Despite being significantly outnumbered, the Caesarians prevailed and the Siege of Massilia was able to continue leading to the eventual surrender of the city.

The naval victory at Tauroento meant that the siege of Massilia could continue with a naval blockade in place. Nasidius decided that, given the state of the Massiliot fleet, it would be prudent to lend his support to Pompey's forces in Hispania Citerior rather than continue to assist operations in Gaul. The city of Massilia was dismayed to learn of the destruction of their fleet but nonetheless prepared for many more months under siege. Soon after the defeat Ahenobarbus fled from Massilia and managed to escape capture under cover of a violent storm.