Álvaro Núñez de Lara (c. 1170 – 1218) was a Castilian nobleman who played a key role, along with other members of the House of Lara, in the political and military affairs of the Kingdoms of León and Castile around the turn of the 13th century. He was made a count in 1214, served as alférez to King Alfonso VIII of Castile, was the regent during the minority of King Henry I of Castile, and was mayordomo (steward) to King Alfonso IX of León. He opposed Queen Berengaria of Castile and her son King Ferdinand III and supported the King of León during the war between the two countries of 1217–1218. At the end of his life he was a knight of the Order of Santiago, in whose Monastery of Uclés he was buried.
His father, Count Nuño Pérez de Lara, a descendant of the counts of Castile, was regent during the minority of Alfonso VIII of Castile, while his mother, Teresa Fernández de Traba, was a member of the powerful Galician House of Traba and descended from an illegitimate daughter of King Alfonso VI of León. When Count Nuño died in 1177, Teresa married King Ferdinand II of León, who thus became the stepfather of her children, who were then raised at court along with the future King of León, Alfonso IX.