Infante Carlos, Count of Montemolín (31 January 1818 – 13 January 1861), was the Carlist claimant to the throne of Spain under the name Carlos VI after his father's renouncement in 1845, when he took the title of Conde de Montemolín (Count of Montemolín).
In 1860, during a Carlist rising, he and his brother Infante Don Fernando were taken prisoners at San Carlos de la Rápita. They were later liberated.
In 1861, suddenly and unexpectedly, Carlos Luis, his wife Carolina and his brother Fernando died, probably from typhus. The three are buried in Trieste, in the chapel of Saint Charles Borromeo in the cathedral. He was succeeded in pretendence by his brother Juan, Count of Montizón.
The generations indicate descent from Carlos I, under whom the crowns of Castile and Aragon were united, forming the Kingdom of Spain. Previously, the title Infante had been largely used in the different realms.
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