Marcus Cornelius Cethegus

Marcus Cornelius Cethegus was a Roman statesman in the first half of the 2nd century BC. He was elected consul in 160 BC, in which position he served alongside Lucius Anicius Gallus.

In 171 BC he was sent as part of a commission into Cisalpine Gaul to determine why the consul Gaius Cassius Longinus had left his province. In 169 BC he was triumvir coloniae deducendae, an official charged with establishing a colony in Aquileia.