| Honorific-Prefix: | The Most Excellent |
| Leopoldo Augusto de Cueto | |
| Honorific-Suffix: | 1st Marquis of Valmar |
| Birth Name: | Leopoldo Augusto de Cueto y López de Ortega |
| Birth Date: | 16 July 1815 |
| Birth Place: | Cartagena, Spain |
| Death Place: | Madrid, Spain |
| Office: | Minister of State |
| Primeminister: | Francisco Armero |
| Term Start: | 15 October 1857 |
| Term End: | 25 October 1857 |
| Predecessor: | Pedro José Pidal |
| Successor: | Francisco Martínez de la Rosa |
| Office2: | Seat J of the Real Academia Española |
| Term Start2: | 14 March 1858 |
| Term End2: | 12 January 1901 |
| Predecessor2: | Manuel José Quintana |
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.[1]
|-