D. Luís de Meneses, 3rd Count of Ericeira (22 July 1632 — 26 May 1690) was a Portuguese nobleman, military man, historian, and politician.

He was eight years old when the Portuguese Restoration War started in 1640, he served under the eldest son of King John IV, Theodosius of Braganza who was later Prince of Brazil; during the war, he was artillery general and later a member of the Council of State.

After the end as a reward for defeating Spanish troops at the countryside of rio Degebe, he received the Lordship of the town of Ansião.

Later he was a supporter of the Duke of Beja and the crisis of the aristocracy which led to the abdication of Afonso VI of Portugal on 1667.

[5][3] He appeared to suffer from depression, described at the time as "bouts of melancholy"; in 1690 he committed suicide at the palace in Lisbon.