Piotr Smietanski (born June 27, 1899 – died probably on February 23, 1950), was a Polish non-commissioned officer in the Ministry of Public Security and executioner at Mokotów Prison.Smietanski was stationed at the Mokotów Prison in the Warsaw borough of Mokotów (Polish: Wiezienie mokotowskie) known also as Rakowiecka Prison located at 37 Rakowiecka Street.
From World War II until the collapse of the Eastern Bloc in 1989, Mokotów Prison – where Smietanski conducted his deeds – was a place of detention, torture and execution of the Polish anti-communist opposition.