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.
Territories of Poland annexed by the Soviet Union
17 days after the German invasion of Poland in 1939, which marked the beginning of the Second World War, the Soviet Union invaded the eastern regions of Poland (known as the ""Kresy""), which Poland re-established during the Polish–Soviet War, and annexed territories totaling with a population of 13,299,000. Inhabitants besides ethnic Poles included Czech, Lithuanian, Belarusian, Ukrainian, Jewish, and other minority groups.