Maurice "the Resolute" de Berkeley
- Born: 1218, Berkeley Castle, Berkeley, Gloucestershire, England
- Marriage: Isabel of Dover FitzRoy about 1246
- Died: 4 Apr 1281 at age 63
- Buried: St Augustine's Abbey, Bristol, Gloucestershire, England
Sir Maurice de Berkeley "the Resolute", 8th (feudal) Baron de Berkeley, was an English soldier and rebel, residing at Berkeley Castle in the English county of Gloucestershire.
Maurice was born in 1218 to Thomas de Berkeley and Joan de Somery. He married Isabel de Croun FitzRoy, the daughter of Richard FitzRoy, Baron of Chilham and Rose de Douvres, sometime before 12 July 1247.
Berkeley fought in the French Wars and was invested as a knight before 1242. He inherited the title of Baron de Berkeley in 1243 and, on 14 December 1243, he had livery of his father's lands. He fought in the war in North Wales and in 1264 he joined the Barons against King Henry III. Berkeley died on 4 April 1281 and was buried in St Augustine's Abbey in Bristol.
Maurice married Isabel of Dover FitzRoy, daughter of Richard FitzRoy Baron of Chilham and Kent and Rose de Douvres, about 1246. (Isabel of Dover FitzRoy was born about 1218.)