Count of Vale de Reis (in Portuguese Conde de Vale de Reis) is a Portuguese title of nobility granted by royal decree of King Philip III of Portugal, dated from August 16, 1628, to Nuno de Mendonça (– 1632).
The Counts of Vale de Reis, who inherited several Lordships and estates, became Marquesses of Loulé (in 1799) and Dukes of Loulé (in 1862).
Originally, the family name associated with this House was Mendonça.
Due to different Lordships inherited by this family, several other names were added and, in the late 18th Century, they became known as Mendonça Rolim de Moura Barreto.
(for the list of holders after this date see Duke of Loulé)
The family also holds the titles of: