Michał Grabowski of the Oksza coat of arms (1773 – 17 August 1812) was a brigadier general of the Army of Duchy of Warsaw.
He was the natural son of the King of Poland, Stanisław August Poniatowski and Elizabeth Grabowska, from the house Szydłowska and brother of Stanislaw Grabowski.
He stayed under the care of the King Stanisław August Poniatowski which was on the alert of the course of his army career.
In 1792, during the war with Russia he was major 5 of Regiment of Fusiliers. In 1794, during the Kosciuszko Insurrection, as the adjutant he stayed in surrounding the king after the III partition of Poland he kept which company in Hrodna and Sankt Petersburg. He participated in the campaign of 1807, commanding the 1st Infantry Regiment in Poniatowski's Division. Appointed the brigadier general, became a commanding officer of the square in Gdańsk, and a little bit later became a commanding officer of the built still Stronghold Modlin. In 1808 he was a commander of the brigade in of 3 Divisions. From 1809-1810 he commanded the garrison of Danzig under Jean Rapp.
In 1811 he was sent in a military mission to the Dresden. In 1812, during the expedition of Napoleon to Russia, he commanded the 1st Brigade of Kniaziewicz's 18th Division in the V Corps. 4 July 1812, in Hrodna, signed the accession to the general confederacy of the Congress Kingdom of Poland established in 1815 at the Congress of Vienna. He was appointed the governor of Mogilev. On 17 August 1812 he was killed during the storm of Smolensk.