Martin Ernst von Schlieffen (30 October 1732 in Pudenzig, Pomerania – 15 February 1825 near Heiligenrode) was a German general, politician, writer and garden architect.
In 1772 he was promoted to lieutenant-general by Landgrave Frederick II of Hesse-Kassel, and made Minister of State of Hesse.
Schlieffen became the most important adviser of Landgraves Frederick II and William IX.
In 1776 he accompanied to London the troops that had been lent to England by the Hessian Landgrave for the war in North America.
He devoted himself to scientific studies and was a prolific writer, for which he received membership in the Prussian and the Bavarian Academy of Sciences (1808).