Mul (Old English: Mūl, literally "mule") (died 687) was an Anglo-Saxon ruler of the Kingdom of Kent in England.
The name Mul is very unusual and it has been postulated that it derives from the Latin mulus meaning mule, a word which is known to have entered the Old English vocabulary; presumably it was a nickname which became habitual.
Mul is described as briefly ruling as King of the Kingdom of Kent following its conquest by Caedwalla in 686.
The Anglo-Saxon Chronicle relates that in 686, "Caedwalla and Mul, his brother, ravaged Kent and Wight."
The same Chronicle notes that in 694 the people of Kent came to terms with Ine of Wessex, Caedwalla's successor, and granted him a sum "because they had burned Mul earlier".