Poles
Polish people are the sixth largest national group in the European Union. Estimates vary depending on source, though available data suggest a total number of around 60 million people worldwide (with roughly 21 million living outside of Poland, many of whom are not of Polish ethnicity, but Polish nationals). There are almost 38 million Poles in Poland alone. There are also Polish minorities in the surrounding countries including (Germany), and indigenous minorities in the Czech Republic, Hungary, Slovakia, northern and eastern Lithuania, western Ukraine, and western Belarus. There are some smaller indigenous minorities in nearby countries such as Moldova. There is also a Polish minority in Russia which includes indigenous Poles as well as those forcibly deported during and after World War II; the total number of Poles in what was the former Soviet Union is estimated at up to 3 million.
World War II casualties of Poland
The Polish government estimate of war dead in 1947 was based on the results of the 1931 Polish census using the criterion of language spoken to breakout the various ethnic groups. The classification of the ethnic groups in Poland during the Second Polish Republic is a disputed topic, Tadeusz Piotrowski called the 1931 Polish census "unreliable", noting that it had underestimated the number of non-Poles The official figures for nationality from the 1931 Polish census based on the mother tongue put the percentage of ethnic Poles at 68.9%, Jews 8.6% and other minority groups 22.5%., Tadeusz Piotrowski maintains that the adjusted census figures(taking religious affiliation into account) put the percentage of ethnic Poles at 64.7%, Jews 9.8% and other minority groups 25.5% of Poland's population. Based on the analysis by Tadeusz Piotrowski roughly 1.0 million Ukrainians and Belarusians and 400,000 Polish speaking Jews were misclassified as Poles in the official figures for the 1939 population. Polish demographer Piotr Eberhardt maintains that it is commonly agreed that the criterion of declared language to classify ethnic groups led to an overestimation of the number of Poles in pre-war Poland. He notes that in general, the numbers declaring a particular language do not mesh with the numbers declaring the corresponding nationality. Members of ethnic minority groups believe that the language criterion led to an overestimation of Poles.