Eighty percent of the Jews in Germany (about 400,000 people) held German citizenship. The remainder were mostly Jews of Polish citizenship, many of whom were born in Germany and who had permanent resident status in Germany. In all, about 70 percent of the Jews in Germany lived in urban areas. Fifty percent of all Jews in Germany lived in the 10 largest German cities. The largest Jewish population centers were in Berlin (about 160,000), Frankfurt am Main (about 26,000), Breslau (about 20,000), Hamburg (about 17,000), Cologne (about 15,000), Hannover (about 13,000), and Leipzig (about 12,000). Slightly more than 10,000 Jews lived in the Free City of Danzig. The overwhelming majority of Jews in Austria, some 178,000, lived in the capital city, Vienna. The largest Jewish community in Czechoslovakia was in Prague, the capital city, with 35,000 people.
Source: U.S. Holocaust Memorial Museum