Count Carl Erik Mannerheim (14 December 1759 – 15 January 1837) was a Swedish–Finnish soldier, statesman and member of the Senate of Finland as its first Vice Chairman of the Economic Division, an office corresponding to that of the modern Prime Minister.

Mannerheim studied at Uppsala University, which he left to pursue his military career.

[1][2] In 1796 he married Baroness Vendla Sofia von Willebrand [fi], daughter of Baron Ernst Gustaf von Willebrand [fi], a wealthy general and governor of Turku and Pori Province 1790–1806, and wife Wendla Gustava Wright and maternal aunt of Aurora Karamzin.

[2][5] In 1809 Mannerheim became a member of the Diet of Porvoo and took part in the creation of Grand Duchy's institutions.

[6] He was the main figure in the Finnish delegation sent to the Russian Emperor that discussed Finland's future within the tsar's realm.