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.
Administrative division of Polish territories during World War II
By the end of the Polish Defensive War the Soviet Union had taken over 52.1% of the territory of Poland (circa 200,000 km²), with over 13,700,000 people. The estimates vary; Professor Elżbieta Trela-Mazur gives the following numbers in regards to the ethnic composition of these areas: 38% Poles (ca. 5.1 million people), 37% Ukrainians, 14.5% Belarusians, 8.4% Jews, 0.9% Russians and 0.6% Germans. There were also 336,000 refugees from areas occupied by Germany, most of them Jews (198,000). Areas occupied by the USSR were annexed to Soviet territory, with the exception of area of Wilno, which was transferred to Lithuania, although soon attached to USSR, when Lithuania became a Soviet republic.