Civil Administration of the Eastern Lands was a civil authority of the territories controlled by Second Polish Republic but not incorporated into the state itself, that was formed during the Polish–Soviet War in 1919 and existed until 1920. It was formed on 19 February 1919 from the territories taken by Poland during the war, that were previously occupied by the Russian SFSR. In the summer of 1920, forces of Russian SFSR had conquered the area. After part of the area was reconquered by Poland, the administration was formally disestablished on 9 September 1920, and replaced by the Provisional Administration of Front-line and Phase Territories.