Quintus Petilius Cerialis Caesius Rufus (born ca.

30) is a Roman general and administrator who serves in Britain during Boudica's rebellion and who goes on to participate in the civil wars after the death of Nero.

He later defeats the rebellion of Julius Civilis and returns to Britain as its governor.

His name suggests that he was an adopted son of a Caesius family into the Petilii.

His elder brother may have been Caesius Nasica.