Zeuxis (/ˈzuːksᵻs/ or /ˈzjuːksᵻs/; Ancient Greek: Zεῦξις Κυνάγου Μακεδών Greek pronunciation: [zdêuksis]) was a general and official in the service of the Seleucid king Antiochus III the Great at the end of the 3rd century BC. He led the royal forces in Mesopotamia against the rebel Molon, served as the governor of cis-Tauric Asia Minor from 213 BC onwards, and was a general at the Battle of Magnesia. After that defeat he went to Rome to negotiate a peace.
Zeuxis, son of Kynagos, was engaged in 221 BC in the war with Molon, satrap of Media, whom he prevented from crossing the Tigris. Being placed under the command of Xenoetas, he was left by the latter in charge of the camp, when he made his ill-fated attempt to overpower Molon. But he retired on the approach of Molon, and this time did not oppose Molon's crossing of the Tigris. When Antiochus himself marched against Molon, Zeuxis advised him to cross the Tigris in opposition to Hermeias's proposal that the army march down the near side of the river - according to Polybius, despite his fear of Hermeias's power. He was in command of the left wing in the battle that ensued. He also took a prominent part in the siege of Seleucia on the Tigris.