Sextus Atilius Serranus was a Roman politician in the second century BC.
In 136 BC, he was elected consul together with Lucius Furius Philus as his colleague.
[1] The proconsul of Hispania Citerior, Gaius Hostilius Mancinus, had signed a humiliating peace treaty with the Numantines.
[2] Having refused the treaty, Serranus sent Mancinus back to the Numantines in chains.
[3] In 135 BC, Serranus served as proconsul of Cisalpine Gaul.