Tirana County has experienced a generally high rate of population increase since the late twentieth century in part due to the fall of communism. Internal migration has been a significant factor in its population growth, especially from Berat, Dibër and Kukës. Nonetheless, the most densely populated areas are positioned in the flat western half, and the region around the relatively small corridor of the city of Tirana, thus the lowest densities are located in the mountainous eastern half.