For the Frankish ruler of Aragon, see Aureolus of Aragon.

Aureolus (d. 268) was a Roman cavalry commander under the emperor Gallienus. After putting down several uprisings he fell out with Gallienus and was besieged in Mediolanum (modern Milan) in 268. After Gallienus' death, Aureolus proclaimed himself emperor but then surrendered to Claudius Gothicus. He was killed by the Praetorian Guard.

The story is told in the Historia Augusta, where he is listed among the Thirty Tyrants.