Carlos Luis de Borbón, count de Montemolín
- Byname:
- Don Carlos
- Died:
- Jan. 13, 1861, Trieste, Austrian Empire [now in Italy] (aged 42)
- Also Known As:
- Charles VI
- Don Carlos
- Carlos Luis de Borbón, Count de Montemolín
- Political Affiliation:
- Carlism
- House / Dynasty:
- house of Bourbon
- Notable Family Members:
- father Carlos María Isidro de Borbón, conde de Molina
- Role In:
- Carlist wars
Carlos Luis de Borbón, count de Montemolín (born Jan. 31, 1818, Madrid, Spain—died Jan. 13, 1861, Trieste, Austrian Empire [now in Italy]) was the second Carlist, or Bourbon traditionalist, Spanish pretender (as Charles VI) who twice attempted unsuccessfully to seize the throne and who by perpetuating the breach within the Bourbon royal family helped weaken support for the monarchy.
Montemolín, grandson of Charles IV (reigned 1788–1808), was given the Carlist mantle by his father, Don Carlos, Count de Molina, in 1845. In 1846–48 Montemolín’s Carlist partisans fought a hopeless war in Catalonia against his Bourbon cousin Queen Isabella II. In 1860 he again tried to wrest the throne from Isabella but was unsuccessful. He was captured and signed an abject renunciation of his claims, which he repudiated once safely in exile. When he died childless shortly thereafter, Carlist leadership passed to his brother Don Juan.