Ignacy Erazm Działyński (1754–1797) was a Polish nobleman (szlachcic) of Ogończyk Coat of Arms and a military officer, known for his participation in the Warsaw Uprising of 1794. Born in 1754 in Konarzew near Poznań, he was the son of the Voivode of Kalisz Augustyn Radomiecki and his wife Anna. Orphaned early by his father, he was raised by his father-in-law, Great Lithuanian Marshal Władysaw Gótowski. Educated in the Jesuit school in Poznań and the Collegium Nobilium in Warsaw, in 1784 he married Szczęsna Woroniczówna, daughter of a Spaniard of Bełsk and owner of much land in Wołyń.