Morcar (or Morkere) (Old English: Mōrcǣr) (died 1015) was a thane (minister) of King Æthelred the Unready. He was given lands in Derbyshire in 1009 including Weston-on-Trent, Crich and Smalley by King Æthelred, 1011 and 1012. He was also given the freedom from the three common burdens. He and his brother were executed in 1015. Morcar's brother's wife was later married to King Edmund Ironside.
Morcar was the son of Earngrim according to John of Worcester and his brother was Sigeferth. He was mentioned in the will of Wulfric Spot, brother of Ælfhelm and son of Wulfrun. In 1004, when Wulfric died, he made Morcar a major beneficiary along with Burton Abbey and Ælfhelm.
It is reported that Morcar was married to Ealdgyth who was the daughter of Ælfthryth, the sister of Wulfric and Ælfhelm.
Morcar was a king's thegn (Latin minister) in 1009 when King Æthelred the Unready issued a charter, in which he gave lands to his minister Morcar. The charter shows that he would control the crossings of the River Trent at, Weston-on-Trent, Wilne and King's Mills in Leicestershire. Although not mentioned explicitly the land described at Weston on Trent included ownership of what is now the villages of Shardlow and Aston-on-Trent.