Leopoldo Augusto de Cueto, 1st Marquis of Valmar

Leopoldo Augusto de Cueto y López de Ortega, 1st Marquis of Valmar (16 July 1815 – 12 January 1901) was a Spanish noble, writer, diplomat and politician.

He was born in Cartagena, Spain. He served as Minister of State in 1857. He died in Madrid, aged 85.