Luis Antonio Tomás Fernandez de Portocarrero y Moscoso, (7 March 1649 – 1723), 5th Count of Palma del Río, was a Spanish noble and Viceroy of Catalonia.
His father was Fernando Luis de Portocarrero, 4th Count of Palma del Rio and 2nd Marquis of Almenara.
His father died in the same year as he was born and his mother remarried with Enrique de Pimentel y Moscoso, former Viceroy of Aragon.
His uncle was Luis Manuel Fernández de Portocarrero y de Guzman, former Viceroy of Sicily, Cardinal of Toledo, and member of the Council of State under King Carlos II of Spain.
He married in 1667 with his cousin María Leonor de Moscoso and had 7 children, including Luis Antonio Tomas was awarded the title of Grandee of Spain, 2nd class, by King Philip V of Spain, in 1697.