Mihailo Petrović (Gradac, Serbia, 30 June 1871 – Raška, Kingdom of Yugoslavia, 28 April 1941) was an early member of the Serbian Chetnik Organization and the Society of Saint Sava. He participated in the early Chetnik struggles to liberate Old Serbia from Ottoman, Albanian and Bulgarian treachery (1903–1912), the Balkan Wars (1912–1913) and the Great War (1914–1918).