Baron, later Count Sándor Károlyi de Nagykároly (German: Alexander Károly von Nagy-Károly; 20 March 1668 – 8 September 1743) was a Hungarian aristocrat, statesman and Imperial Feldmarschall.

He was born in Nagykároly, Kingdom of Hungary (present-day Carei, Romania) on 20 March 1668, as a son of László Károlyi and his second wife, Erzsébet Sennyey.

[2] In 1691 Louis, Margrave of Baden-Baden, also called Türkenlouis, was returning from his Transylvanian victories and Károlyi rode to meet him, to pay his respects.

[3] Károlyi traveled to Vienna to negotiate with Imperial ministers over what he and other nobles deemed excessive taxation, conscription, and extraction of war contributions; his wife remained at the family estate.

After a series of attempts to recover his property, locate his family, and complete negotiations for fairer extractions, he was pushed into rebellion with several other Hungarian nobles.

[5] The ongoing insurrection, in which Sándor Károlyi played a significant part, led to the deposition of the Habsburg king in Hungary in 1707.

[4] On 30 April 1711, with the Treaty of Szatmár, a group of Hungarian nobles led by Károlyi deserted its leader Rákóczi and recognized Habsburg rule.

He and his wife, Countess Krisztina Barkóczy de Szala, had three children, Ferenc (1705–1758), who was a general of cavalry, Klára, and László, who died in 1702.