Menendo González (Portuguese and Galician: Mendo Gonçalves; died 6 October 1008) was a semi-autonomous Duke of Galicia and Count of Portugal (997–1008) and a dominant figure in the Kingdom of León around the turn of the second millennium. He was the armiger regis, or royal alférez, the king's armour-bearer and commander of the royal armies, under Vermudo II, and he continued to hold the position until his death. He became the tutor (1003) and ultimately father-in-law of Vermudo's successor, King Alfonso V. He maintained peaceful diplomatic relations with the Caliphate of Córdoba until 1004, after which there was a state of war.