Roger de Mortimer (before 1153 – before 8 July 1214) was a medieval marcher lord, residing at Wigmore Castle in the English county of Herefordshire.
Roger was the son of Hugh de Mortimer (died 26 February 1181)[1] and Matilda Le Meschin.
[4] In 1196 he joined forces with Hugh de Say of Richards Castle and fought and lost the battle of New Radnor against Rhys ap Gruffydd,[5] allegedly losing some forty knights and a large number of foot in the fight.
In the summer of 1214 he became gravely ill and bought from King John the right for his son to inherit his lands while he still lived.
Roger married Isabel (d. before 29 April 1252), the daughter of Walchelin de Ferriers of Oakham Castle in Rutland before 1196.