Demographics of Poland
According to GUS, about 38,325,000 people live in Poland, however, the same report states that the number of residents living in the country all the time is approximately 37,200,000; with 1,125,000 people living abroad for 6 to 7 months or more. It means that the permanent population may be correspondingly smaller.
World War II casualties of Poland
In the aftermath of the September 1939 German and Soviet invasion of Poland, the territory of Poland was divided between Nazi Germany and the Soviet Union (USSR). The Soviet occupied territories of Poland, with total population of 13.0 million, was subjected to a reign of terror. According to research published in 2009 by the Institute of National Remembrance about 1.0 million Polish citizens from all ethnic groups were arrested, conscripted or deported by the Soviet occupiers from 1939 to 1941; including about 200,000 Polish military personnel held as prisoners of war; 100,000 Polish citizens were arrested and imprisoned by the Soviets, including civic officials, military personnel and other "enemies of the people" like the clergy and Polish educators; 475,000 Poles who were considered "enemies of the people" were deported to remote regions of the USSR; 76,000 Polish citizens were conscripted into the Soviet Armed forces and 200,000 were conscripted as forced laborers in the interior of the Soviet Union. When the Soviet forces returned to Poland in 1944-1945 there was a new wave of repression of Polish citizens from all ethnic groups including 188,000 deported, 50,000 conscripted as forced labor and 50,000 arrested.