Łukasz Ciepliński [Polish pronunciation: [ˈwukaʂ t͡ɕɛˈpliɲskʲi]] (born November 26, 1913, died March 1, 1951) was a Polish soldier who fought in the Polish anti-Nazi and anti-communist resistance movements. He used various aliases: Pług, Ostrowski, Ludwik, Grzmot, and Bogdan. Ciepliński was executed at Mokotów Prison in Warsaw, with a shot to the back of the head by the Polish secret police, Urząd Bezpieczeństwa. For almost fifty years, his name was expunged from all books by the Communist government of the PRL.
Ciepliński was born in the village of Kwilcz, Kreis Birnbaum (Polish: Powiat międzychodzki), in then German Empire's Province of Posen, now back again Poland. Although Poland was partitioned at the time, he grew up in a patriotic family. As his native village was located on the then-western outskirts of Polish ethnic territory, his parents– Franciszek Ciepliński and Maria née Kaczmarek– taught him Polish history and traditions as a child. His great-grandfather fought in the Greater Poland Uprising (1848), while his older brothers fought in the Greater Poland Uprising (1918-1919). His parents owned a bakery store, and Cieplinski was one of their eight children.
Young Ciepliński began his education at elementary school in Kwilcz, but completed it in Międzychód in 1929. After graduating from high school, Ciepliński enlisted with the Third Cadet Corps in Rawicz, and in 1934 enrolled in the Military College in Ostrów Mazowiecka. In 1936 the young officer joined the 62nd Infantry Regiment in Bydgoszcz, where a year later he became leader of an antitank unit.