Carl Adolph Castenschiold (1740 – 30 July 1820) was a Danish landowner and royal official.
He owned the Knabstrup Manor and Hagestedgaard estates, and was the brother of Joachim Castenschiold.
Castenschiold was born on St. Thomas in the Danish West Indies, the son of plantation owner Johan Lorentz Carstens and Jacobe von Holten.
He married Dorothea Augusta Brøer (1744 – 14 June 1819) on 5 May 1760 at Hagestedgård.
He married, for a second time, Dorothea Lyngbye (1761 – 9 July 1838) on 14 June 1820.