Bronisław Wilhelm Pieracki (28 May 1895 in Gorlice - 15 June 1934 in Warsaw) was a Polish military officer and politician. As member of Polish Legions in World War I, Pieracki took part in the Polish-Ukrainian War (1918–1919) and he later supported the 1926 May Coup of Józef Piłsudski. Pieracki was a deputy to Polish Sejm from the Nonpartisan Bloc for Cooperation with the Government in 1928 and afterwards deputy of Chief of Staff.