Carl August may refer to:
*
Carl August, Crown Prince of Sweden
Charles August or Carl August (9 July 1768 – 28 May 1810) was a Denmark, Danish prince. He is best known for serving as Crown Prince of Sweden briefly in 1810, adopted by Charles XIII of Sweden, Charles XIII, before his sudden death from a stro ...
(1768 – 1810), Danish nobleman
*
Carl August, Grand Duke of Saxe-Weimar-Eisenach
Karl August, sometimes anglicised as Charles Augustus (3 September 1757 – 14 June 1828), was the sovereign Duke of Saxe-Weimar and of Saxe-Eisenach (in personal union) from 1758, Duke of Saxe-Weimar-Eisenach from its creation (as a political uni ...
(1757 – 1828)
*
Charles Augustus, Hereditary Grand Duke of Saxe-Weimar-Eisenach (1912–1988)
{{hndis