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.
Demographic history of Poland
The population of the Commonwealth of both nations was never overwhelmingly either Roman Catholic or Polish. This resulted from Poland's possession of Ukraine and federation with Lithuania; in both these countries ethnic Poles were a distinct minority. The Commonwealth comprised primarily three nations: Poles, Lithuanians, and Ukrainians and Belarusians (the latter two usually referred to together as Ruthenians). Shortly after the Union of Lublin (1569), at the turn of the 16th to 17th century, the Commonwealth population was around 7 million, with a rough breakdown of 4.5m Poles, 0.75m Lithuanians, 0.7m Jews and 2m Ruthenians. In 1618, after the Truce of Deulino the Commonwealth population increased together with its territory, reaching 12 millions that could be roughly divided into: Poles - 4.5m, Ukrainians - 3.5m, Belarusians - 1.5m, Lithuanians - 0.75m, Prussians - 0.75m, Jews - 0.5m, Livionians - 0.5m; at that time nobility formed 10% and burghers, 15%. Population losses of 1648-1667 are estimated at 4m. Coupled with further population and territorial losses, by 1717 the Commonwealth population had fallen to 9m: roughly 4.5m Poles, 1.5m Ukrainians, 1.2m Belarusians, 0.8m Lithuanians, 0.5m Jews, 0.5m others The urban population was hit hard, falling to below 10%.