Juan Alonso Pimentel de Herrera (baptisised 29 June 1553 in Villalón, died 7 November 1621 in Madrid) was a Knight of the Order of Santiago, Grandee of Spain, 5th Duke of Benavente, 8th Count of Mayorga, 3rd Count of Villalón, President of the Council of Italy, 15th Viceroy of Valencia and 25th Viceroy of Naples.
He was the second son of Antonio Alonso Pimentel y Herrera de Velasco, 3rd Duke of Benavente and María Luisa Enríquez y Téllez-Girón, daughter of Fernando Enríquez de Velasco, 5th Admiral of Castile.
He had experience in the defence of the Spanish coasts and territories, and had supported unity with Portugal in 1580 with 8,000 infantry and 600 cavalry.
After the death of the King, whom he assisted in his final hours, he became Queen Isabel's Chief steward in April 1621.
They had 2 children : In 1582 he married his cousin Mencía de Zúñiga y Requeséns, daughter of Luis de Requesens y Zúñiga, Governor of the Duchy of Milan 1572–1573, Governor of the Spanish Netherlands (1573–1576).