Prince Michał Gedeon Hieronim Radziwiłł (24 September 1778[2] – 24 May 1850[3]) was a Polish noble, senator, and owner of Nieborów.

By January 1807, he had risen to the rank of colonel and became the commander of the Legion-du-Nord, later leading the 5th Infantry Regiment in the Duchy of Warsaw.

During the 1812 campaign, Radziwiłł commanded an infantry brigade in the Polish division under General Grandjean, which was part of Jacques MacDonald’s 10th Army Corps.

He defended Gdańsk in 1813 under General Jean Rapp, but was captured when the fortress surrendered.

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