Gilbert de Clare, 3rd Earl of Hertford (c. 1180–1230), was a prominent English nobleman during the medieval period. He was the son of Richard de Clare, 2nd Earl of Hertford and Maud de Lacy. Gilbert played a significant role in the political landscape of England, particularly during the reign of King John and the early years of King Henry III. As a powerful lord, Gilbert was involved in various military campaigns and held extensive lands in Wales and England. He was known for his loyalty to the crown, although he also faced conflicts with other nobles. His legacy continued through his descendants, who maintained influence in English politics.