Károly Leiningen-Westerburg (German: Karl August, Count zu Leiningen-Westerburg; 11 April 1819, Ilbenstadt (today part of Niddatal, Germany) - 6 October 1849, Arad) was a German honvéd general in the Hungarian Army, and a member of the German princely House of Leiningen.
He was executed for his part in the Hungarian Revolution of 1848, and is considered one of the 13 Martyrs of Arad.