The 19th Infantry Division (Polish: 19 Dywizja Piechoty, Lithuanian: 19-oji Pėstininkų Divizija) of the Polish Army was established in 1923 after the incorporation of Central Lithuania into Poland. It was part of the Prusy Army during the German-led Invasion of Poland. Later during the war, in the summer of 1944, the division was recreated as a Home Army unit, taking part in the Operation Ostra Brama in the summer of 1944.