Demographics
Historically, Poland was a nation of many nationalities. This was especially true after independence was regained in the wake of World War I. The census of 1921 allocates 30.8% of the population in the minority. This was further exacerbated with the Polish victory in the Polish-Soviet War, and the large territorial gains in the east, made by Poland as a consequence. According to the 1931 Polish Census (as cited by Norman Davies), 68.9% of the population was Polish, 13.9% were Ukrainians, around 10% Jewish, 3.1% Belarusians, 2.3% Germans and 2.8% – others, including Lithuanians, Czechs and Armenians. Also, there were smaller communities of Russians, and Gypsies. The situation of minorities was a complex subject and changed during the period.
Poland was also a nation of many religions. In 1921, 16,057,229 Poles (approx. 62.5%) were Roman (Latin) Catholics, 3,031,057 citizens of Poland (approx. 11.8%) were Eastern Rite Catholics (mostly Ukrainian Greek Catholics and Armenian Rite Catholics), 2,815,817 (approx. 10.95%) were Greek Orthodox, 2,771,949 (approx. 10.8%) were Jewish, and 940,232 (approx. 3.7%) were Protestants (mostly Lutheran Evangelical). By 1931 Poland had the second largest Jewish population in the world, with one-fifth of all the world's Jews residing within its borders (approx. 3,136,000). Urban population of interbellum Poland was rising steadily – in 1921, only 24% of Poles lived in the cities, in the late 1930s, the ratio grew to 30%. In more than a decade, the population of Warsaw grew by 200,000, Łódź by 150,000, and Poznań – by 100,000. This was due not only to internal migration, but also extremely high birth rate.
Read more about this topic: Second Polish Republic