Aemilianus (Latin: Marcus Aemilius Aemilianus Augustus; c. 207/213 - 253 CE); also known as Aemilian; was Roman Emperor for three months in 253 CE.

Commander of the Moesian troops; he obtained an important victory against the invading Goths and was; for this reason; acclaimed Emperor by his army. He then moved quickly to Italy; where he defeated Emperor Trebonianus Gallus; only to be killed by his own men when another general; Valerian; proclaimed himself Emperor and moved against Aemilian with a larger army.