- The Duchy of Warsaw had 4.6million people in 1809.
Prussia had 10.7million in 1800.
Brandenburg had 1.5million in 1806.
Warsaw here, I suppose, would be around 9 million with 4.6 million people being from Warsaw.
The 1819 Prussian Census marked West Prussia as being
- 52% Poles (327,300)
- 46% Germans (290,000)
- 2% Jews (12,700)
In 1824, East Prussia had 1,080,000 people
- 50-52% Germans (Slightly over half were German)
- 26% Poles (280,000) A mix of Warmians (Catholic) and Masurians (Protestant) I think.
- 19% Lithuanian (200,000)
- 1.8% Curonian and Latvian (20,000)
- The remainder being Jews (~2,000) and Russian Old Believers
The 1819 Prussia Census marked Upper Silesia as being
- 67% Polish (377,100)
- 29% German (162,600)
In the 1905 Prussian Census, it was marked that 3/4 of Prussian Silesia were German-speaking and that the population east of the Oder was mostly Polish-speaking. Upper Silesia was also pretty mixed. I imagine in 1809 this would have been even more Polish. Plus, Hlucin was Czech.
Prussian Pomerania had a population of around 500,000 in 1800, pretty much all Germans. This includes Western Pomerania. Most of the population was in West Pomerania I think.
Warsaw here would still be 3/5 to 2/3 Polish I think. Plus 3-5% Balts and whatnot.