Alvito Nunes or Aloyto Núñez (died 1015) is an 11th-century Count of Portugal. Following the death of Menendo González in 1008, he governs the county jointly with Toda, count Menendo's widow.

Alvito Nunes is killed by Vikings during a bloody assault on Vermoim Castle, located around Vila Nova de Famalicão.

He is believed to be descended from the first family Portuguese counts, that of Vímara Peres, through one Nuno Alvites (or Aloytez), probable grandson of Lucídio Vimaranes. He was followed in the county by his son Nuno Alvites who died in 1028.