UN Statistical Agency definition:
https://en.wikipedia.org/wiki/United_Nations_geoscheme_for_EuropeUS Census Bureau for countries of birth (some countries with smaller populations classified into "other" categories).
Northern Europe: UK, Ireland, Denmark, Norway, Sweden
Western Europe: Austria, Belgium, France, Germany, Netherlands, Switzerland
Southern Europe: Greece, Italy, Portugal, Spain
Eastern Europe: Albania, Belarus, Bulgaria, Croatia, Czechoslovakia (!), Hungary, Latvia, Lithuania, Macedonia, Moldova, Poland, Romania, Russia, Ukraine, Bosnia and Herzegovina, Serbia
