An ealdorman (from Old English ealdorman, lit. "elder man"; plural: "ealdormen") is the term used for a high-ranking royal official and prior magistrate of an Anglo-Saxon shire or group of shires from about the ninth century to the time of King Cnut. The term ealdorman was rendered in Latin as dux in early West Saxon charters, and as præfectus (which is also the equivalent of gerefa, modern reeve, from which sheriff or shire reeve is derived). In the Life of King Alfred by the Welsh bishop Asser, the Latin equivalent is comes. As the chief magistrate of a shire or group of shires (county) in Anglo-Saxon England, he commanded the army of the shire(s) and districts under his control on behalf of the king.

An ealdorman (from Old English ealdorman, lit. "elder man"; plural: "ealdormen") is the term used for a high-ranking royal official and prior magistrate of an Anglo-Saxon shire or group of shires from about the ninth century to the time of King Cnut. The term ealdorman was rendered in Latin as dux in early West Saxon charters, and as præfectus (which is also the equivalent of gerefa, modern reeve, from which sheriff or shire reeve is derived). In the Life of King Alfred by the Welsh bishop Asser, the Latin equivalent is comes. As the chief magistrate of a shire or group of shires (county) in Anglo-Saxon England, he commanded the army of the shire(s) and districts under his control on behalf of the king.