Agnes Leslie Countess of Morton (born after 1541- died c.1606) was a Scottish noblewoman being the daughter of George Leslie 4th Earl of Rothes as well as a direct descendant of King James II in her maternal line. She was the wife of William Douglas 6th Earl of Morton who as Laird of Lochleven Castle was the custodian of Mary Queen of Scots during her captivity from June 1567 until her escape on 2 May 1568.