Marquess of Loulé (in Portuguese Marquês de Loulé) is a Portuguese title granted by royal decree of Queen Maria I of Portugal, dated from July 6, 1799, to Dom Agostinho Domingos José de Mendoça Rolim de Moura Barreto (1780-1824), who already was 8th Count of Vale de Reis.
This title was later inherited by his son, Nuno José Severo de Mendoça Rolim de Moura Barreto, who married Infanta Ana de Jesus Maria, King John VI younger daughter.
The family name associated with the House of Loulé is de Mendoça Rolim de Moura Barreto.
(for the list of holders after this date see Duke of Loulé)
The family also holds the title of Count of Vale de Reis, granted by decree of King Philip III of Portugal (also known as Philip IV of Spain) dated from August 16, 1628.